22 files changed, 561 insertions, 360 deletions
diff --git a/build.sh b/build.sh
index 404cc1d0..6b174e47 100755
--- a/build.sh
+++ b/build.sh
@@ -6,7 +6,7 @@ buildp_ast() {
 	trap '' HUP INT TERM USR1 USR2;
 	local _param="${1}" _pids="" _pids_niter=0 _pkg_name="" RTL_KILL_TREE_PIDS="";
 	if [ "${_param}" = "abort" ]; then
-		rtl_log_msg fatalexit "Build aborted.";
+		rtl_log_msg "fatalexit" "Build aborted.";
 	fi;
 	while [ "${_pids_niter}" -lt 8 ]; do
 		_pids="$(rtl_lconcat "${_pids}" "${RTL_KILL_TREE_PIDS}")"; RTL_KILL_TREE_PIDS="";
@@ -18,14 +18,14 @@ buildp_ast() {
 		fi;
 	done;
 	if [ -n "${_pids}" ]; then
-		rtl_log_msg verbose "Killed PID(s): %s" "$(rtl_uniq ${_pids})";
+		rtl_log_msg "verbose" "Killed PID(s): %s" "$(rtl_uniq ${_pids})";
 	fi;
 	if [ -n "${EX_PKG_DISPATCH_WAIT}" ]\
 	&& [ "${ARG_RESET_PKG}" -eq 1 ]; then
 		for _pkg_name in ${EX_PKG_DISPATCH_WAIT}; do
 			rtl_state_clear "${BUILD_WORKDIR}" "${_pkg_name}";
 		done;
-		rtl_log_msg verbose "Reset package state for: %s" "${EX_PKG_DISPATCH_WAIT}";
+		rtl_log_msg "verbose" "Reset package state for: %s" "${EX_PKG_DISPATCH_WAIT}";
 	fi;
 	if [ -n "${DEFAULT_BUILD_STATUS_IN_PROGRESS_FNAME}" ]; then
 		rtl_fileop rm "${DEFAULT_BUILD_STATUS_IN_PROGRESS_FNAME}";
@@ -36,17 +36,17 @@ buildp_dispatch_fail_pkg() {
 	local _group_name="${1}" _pkg_name="${2}";
 	: $((BUILD_NFAIL+=1)); BUILD_PKGS_FAILED="$(rtl_lconcat "${BUILD_PKGS_FAILED}" "${_pkg_name}")";
 	if [ "${ARG_RELAXED:-0}" -eq 0 ]; then
-		rtl_log_msg fatal "${BUILD_WORKDIR}/${_pkg_name}_stderrout.log:";
+		rtl_log_msg "fatal" "${BUILD_WORKDIR}/${_pkg_name}_stderrout.log:";
 		cat "${BUILD_WORKDIR}/${_pkg_name}_stderrout.log";
 		if [ -n "${DEFAULT_BUILD_LAST_FAILED_PKG_FNAME}" ]; then
 			printf "%s\n" "${_pkg_name}" > "${DEFAULT_BUILD_LAST_FAILED_PKG_FNAME}";
 		fi;
-		rtl_log_msg fatal "Build failed in \`%s', check \`%s' for details." "${_pkg_name}" "${BUILD_WORKDIR}/${_pkg_name}_stderrout.log";
-	else	rtl_log_msg warning "Build failed in \`%s', check \`%s' for details." "${_pkg_name}" "${BUILD_WORKDIR}/${_pkg_name}_stderrout.log";
+		rtl_log_msg "fatal" "Build failed in \`%s', check \`%s' for details." "${_pkg_name}" "${BUILD_WORKDIR}/${_pkg_name}_stderrout.log";
+	else	rtl_log_msg "warning" "Build failed in \`%s', check \`%s' for details." "${_pkg_name}" "${BUILD_WORKDIR}/${_pkg_name}_stderrout.log";
 	fi;
 	if [ "${ARG_DUMP_ON_ABORT:-0}" -eq 1 ]; then
-		rtl_log_msg info "Logged environment dump for failed package \`%s' to \`%s'." "${_pkg_name}" "${BUILD_WORKDIR}/${_pkg_name}.dump";
-		rtl_log_msg info "Enter an interactive package build shell w/ the command line: ./pkgtool.sh -a %s -b %s \"%s\" PREFIX=\"%s\""\
+		rtl_log_msg "pkg_faildump" "Logged environment dump for failed package \`%s' to \`%s'." "${_pkg_name}" "${BUILD_WORKDIR}/${_pkg_name}.dump";
+		rtl_log_msg "pkg_faildump" "Enter an interactive package build shell w/ the command line: ./pkgtool.sh -a %s -b %s \"%s\" PREFIX=\"%s\""\
 				"${ARCH}" "${BUILD_KIND}" "${_pkg_name}" "${PREFIX}";
 	fi;
 	if [ "${ARG_RELAXED:-0}" -eq 0 ]; then
@@ -57,31 +57,31 @@ buildp_dispatch_fail_pkg() {
 buildp_dispatch_group_state() {
 	local _msg="${1}" _group_name="${2}";
 	case "${_msg}" in
-	finish_group)	rtl_log_msg success_end "[%3d%%     ] [%03d/%03d] Finished \`%s' build group." "${6}" "${4}" "${5}" "${_group_name}"; ;;
-	start_group)	rtl_log_msg success "[%3d%%     ] [%03d/%03d] Starting \`%s' build group..." "${6}" "${4}" "${5}" "${_group_name}"; ;;
+	finish_group)	rtl_log_msg "group_finish" "[%3d%%     ] [%03d/%03d] Finished \`%s' build group." "${6}" "${4}" "${5}" "${_group_name}"; ;;
+	start_group)	rtl_log_msg "group_begin" "[%3d%%     ] [%03d/%03d] Starting \`%s' build group..." "${6}" "${4}" "${5}" "${_group_name}"; ;;
 	esac;
 };
 
 buildp_dispatch_pkg_state() {
 	local _msg="${1}" _group_name="${2}" _pkg_name="${3}";
 	case "${_msg}" in
-	disabled_pkg)	: $((BUILD_NSKIP+=1)); rtl_log_msg notice "Skipping disabled package \`%s'." "${_pkg_name}"; ;;
-	missing_pkg)	rtl_log_msg fatalexit "Error: unknown package \`%s'." "${_pkg_name}"; ;;
-	msg_pkg)	shift 3; rtl_log_msg notice "%s/%s: %s" "${_group_name}" "${_pkg_name}" "${*}"; ;;
-	skipped_pkg)	: $((BUILD_NSKIP+=1)); rtl_log_msg notice "Skipping finished package \`%s'." "${_pkg_name}"; ;;
-	start_pkg)	rtl_log_msg info "[%3d%%/%3d%%] [%03d/%03d] Starting \`%s' build..." "${7}" "${6}" "${4}" "${5}" "${_pkg_name}"; ;;
-	step_pkg)	rtl_log_msg notice "Finished build step %s of package \`%s'." "${4}" "${_pkg_name}"; ;;
+	disabled_pkg)	: $((BUILD_NSKIP+=1)); rtl_log_msg "pkg_skip" "Skipping disabled package \`%s'." "${_pkg_name}"; ;;
+	missing_pkg)	rtl_log_msg "fatalexit" "Error: unknown package \`%s'." "${_pkg_name}"; ;;
+	msg_pkg)	shift 3; rtl_log_msg "pkg_msg" "%s/%s: %s" "${_group_name}" "${_pkg_name}" "${*}"; ;;
+	skipped_pkg)	: $((BUILD_NSKIP+=1)); rtl_log_msg "pkg_skip" "Skipping finished package \`%s'." "${_pkg_name}"; ;;
+	start_pkg)	rtl_log_msg "pkg_begin" "[%3d%%/%3d%%] [%03d/%03d] Starting \`%s' build..." "${7}" "${6}" "${4}" "${5}" "${_pkg_name}"; ;;
+	step_pkg)	rtl_log_msg "pkg_step" "Finished build step %s of package \`%s'." "${4}" "${_pkg_name}"; ;;
 	finish_pkg)
 		: $((BUILD_NFINI+=1));
-		if rtl_lmatch "${ARG_VERBOSE_LEVELS}" "build" ","; then
+		if rtl_lmatch "${ARG_VERBOSE_TAGS}" "build" ","; then
 			cat "${BUILD_WORKDIR}/${_pkg_name}_stderrout.log";
 		fi;
-		rtl_log_msg info_end "[%3d%%/%3d%%] [%03d/%03d] Finished \`%s' build." "${7}" "${6}" "${4}" "${5}" "${_pkg_name}"; ;;
+		rtl_log_msg "pkg_finish" "[%3d%%/%3d%%] [%03d/%03d] Finished \`%s' build." "${7}" "${6}" "${4}" "${5}" "${_pkg_name}"; ;;
 	start_pkg_child)
 		if [ "${PKG_NO_LOG_VARS:-0}" -eq 0 ]; then
 			rtl_log_env_vars "notice" "build" $(rtl_get_vars_fast "^PKG_");
 		fi;
-		if rtl_lmatch "${ARG_VERBOSE_LEVELS}" "xtrace" ","; then
+		if rtl_lmatch "${ARG_VERBOSE_TAGS}" "xtrace" ","; then
 			set -o xtrace;
 		fi; ;;
 	esac;
@@ -122,30 +122,30 @@ build() {
 		DEFAULT_TARGET="" DEFAULT_WGET_ARGS="" MIDIPIX_BUILD_PWD="";
 	DEFAULT_BUILD_STATUS_IN_PROGRESS_FNAME=""; EX_PKG_DISPATCH_WAIT="";
 	if ! . "${0%/*}/subr/build_init.subr"; then
-		_rc=1; printf "Error: failed to source \`${0%/*}/subr/build_init.subr'." >&2;
+		printf "Error: failed to source \`${0%/*}/subr/build_init.subr'." >&2; exit "${_rc}";
 	elif ! build_init "${@}"; then
-		_rc=1; _status="${_status}";
+		printf "Error during initilisation: %s.\n" "${_status}" >&2; exit "${_rc}";
 	elif [ -n "${_status}" ]; then
 		_rc=0; _status="${_status}";
 	else	trap "buildp_ast exit" EXIT; trap "buildp_ast abort" HUP INT TERM USR1 USR2;
 		buildp_time_init;
-		rtl_log_msg info "Build started by %s@%s at %s." "${BUILD_USER}" "${BUILD_HNAME}" "${BUILD_DATE_START}";
-		rtl_log_env_vars "notice" "build (global)" ${DEFAULT_LOG_ENV_VARS};
+		rtl_log_msg "build_begin" "Build started by %s@%s at %s." "${BUILD_USER}" "${BUILD_HNAME}" "${BUILD_DATE_START}";
+		rtl_log_env_vars "build_vars" "build (global)" ${DEFAULT_LOG_ENV_VARS};
 		ex_pkg_dispatch "${DEFAULT_BUILD_STEPS}" "${DEFAULT_BUILD_VARS}"			\
 				buildp_dispatch "${BUILD_GROUPS}" "${BUILD_GROUPS_INHIBIT_DEPS}"	\
 				"${ARG_PARALLEL}" "${BUILD_WORKDIR}/build.fifo" "${ARG_RESTART}"	\
 				"${ARG_RESTART_AT}" "${ARG_RESTART_RECURSIVE}" "${BUILD_WORKDIR}";
 		buildp_time_update;
-		rtl_log_msg info "%s finished, %s skipped, and %s failed package(s)." "${BUILD_NFINI:-0}" "${BUILD_NSKIP:-0}" "${BUILD_NFAIL:-0}";
-		rtl_log_msg info "Build time: %s hour(s), %s minute(s), and %s second(s)." "${_build_time_hours:-0}" "${_build_time_minutes:-0}" "${_build_time_secs:-0}";
+		rtl_log_msg "build_finish" "%s finished, %s skipped, and %s failed package(s)." "${BUILD_NFINI:-0}" "${BUILD_NSKIP:-0}" "${BUILD_NFAIL:-0}";
+		rtl_log_msg "build_finish_time" "Build time: %s hour(s), %s minute(s), and %s second(s)." "${_build_time_hours:-0}" "${_build_time_minutes:-0}" "${_build_time_secs:-0}";
 		if [ -n "${BUILD_PKGS_FAILED}" ]; then
 			_rc=1; _status="Build script failure(s) in: ${BUILD_PKGS_FAILED}.";
 		fi;
 	fi;
 	if [ "${_rc}" -ne 0 ]; then
-		rtl_log_msg fatalexit "${_status}";
+		rtl_log_msg "fatalexit" "${_status}";
 	elif [ -n "${_status}" ]; then
-		rtl_log_msg info "${_status}";
+		rtl_log_msg "info" "${_status}";
 	fi;
 };
 
diff --git a/dist/dist_minipix.dist b/dist/dist_minipix.dist
index f5ea59be..f3dc4e01 100644
--- a/dist/dist_minipix.dist
+++ b/dist/dist_minipix.dist
@@ -72,7 +72,7 @@
 pkg_dist_minipix_all() {
 	local _vflag="";
 
-	if rtl_lmatch "${ARG_VERBOSE_LEVELS}" "install" ","; then
+	if rtl_lmatch "${ARG_VERBOSE_TAGS}" "install" ","; then
 		_vflag="-v";
 	fi;
 	if rtl_lmatch "${ARG_DIST}" "minipix" ","								\
diff --git a/dist/dist_zipdist.dist b/dist/dist_zipdist.dist
index 0cdc9c65..7361a8a4 100644
--- a/dist/dist_zipdist.dist
+++ b/dist/dist_zipdist.dist
@@ -6,10 +6,10 @@ pkg_dist_zipdist_all() {
 	local _dist_fname="" _pkg_name="" _pkglist_fname="${PREFIX}/pkglist.native";
 	if rtl_lmatch "${ARG_DIST}" "zipdist" ","; then
 		echo "msg_pkg dist dist_zipdist Building deployable distribution ZIP archive..." >&3;
-		rtl_log_msg info "Finished building deployable distribution ZIP archive.";
+		rtl_log_msg "zipdist" "Finished building deployable distribution ZIP archive.";
 		for _pkg_name in $(cat "${_pkglist_fname}"); do
 			if [ ! -e "${BUILD_WORKDIR}/${_pkg_name}-native-${DEFAULT_TARGET}" ]; then
-				rtl_log_msg fatalexit "Error: missing package build directory for package \`%s'." "${_pkg_name}";
+				rtl_log_msg "fatalexit" "Error: missing package build directory for package \`%s'." "${_pkg_name}";
 			fi;
 		done;
 		_dist_fname="${DEFAULT_ZIPDIST_FNAME_PREFIX}${BUILD_USER}@${BUILD_HNAME}-${BUILD_DATE_START}.zip";
@@ -34,19 +34,19 @@ pkg_dist_zipdist_all() {
 			return 1;
 		else
 			echo "msg_pkg dist dist_zipdist Finished building deployable distribution ZIP archive." >&3;
-			rtl_log_msg info "Finished building deployable distribution ZIP archive.";
+			rtl_log_msg "zipdist" "Finished building deployable distribution ZIP archive.";
 			if [ -n "${DEFAULT_ZIPDIST_SIGN_GPG_KEY:-}" ]\
 			&& [ -x "$(which gpg 2>/dev/null)" ]\
 			&& gpg --list-keys "${DEFAULT_ZIPDIST_SIGN_GPG_KEY}" >/dev/null 2>&1; then
 				echo "msg_pkg dist dist_zipdist Signing deployable distribution ZIP archive..." >&3;
-				rtl_log_msg info "Signing deployable distribution ZIP archive...";
+				rtl_log_msg "zipdist" "Signing deployable distribution ZIP archive...";
 				if ! gpg --armor --passphrase-file /dev/null		\
 					--local-user "${DEFAULT_ZIPDIST_SIGN_GPG_KEY}"	\
 					--sign "${PREFIX}/${_dist_fname}"; then
 					return 1;
 				fi;
 				echo "msg_pkg dist dist_zipdist Signed deployable distribution ZIP archive." >&3;
-				rtl_log_msg info "Signed deployable distribution ZIP archive.";
+				rtl_log_msg "zipdist" "Signed deployable distribution ZIP archive.";
 			fi;
 		fi;
 	fi;
diff --git a/etc/README.md b/etc/README.md
index b3a62709..9cce5684 100644
--- a/etc/README.md
+++ b/etc/README.md
@@ -496,87 +496,100 @@ env ARCH=nt64 BUILD_KIND=release PREFIX_ROOT="${HOME}/midipix_tmp" ./build.sh -D
 usage: ./build.sh [-a nt32|nt64]  [-b debug|release]    [-C dir[,..]]  [-D kind[,..]]
                   [-F ipv4|ipv6|offline]    [-h|--help] [-p jobs|-P]    [-r ALL|LAST]
                   [-r [*[*[*]]]name[,..][:ALL|LAST|[^|<|<=|>|>=]step,..]]        [-R]
-		  [-v[v]]   [-V {notice,verbose,build,fileops,install,xtrace}]   [-x]
+		  [-v] [-V [+]tag|pat[,..]]
 
                   [--as-needed]  [--debug-minipix] [--dump-on-abort]  [--reset-state]
                   [--roar]      [[=]<group>|<variable name>=<variable override>[ ..]]
 
-        -a nt32|nt64      Selects 32-bit or 64-bit architecture; defaults to nt64.
-        -b debug|release  Selects debug or release build kind; defaults to debug.
-        -C dir[,..]       Clean build directory (build,) ${PREFIX} before processing build
-                          scripts (prefix,) source directory (src,) and/or destination
-                          directory (dest) after successful package builds.
-        -D kind[,..]      Produce minimal midipix distribution directory (minipix,) RPM
-                          binary packages (rpm,) and/or deployable distribution ZIP
-                          archive (zipdist.) zipdist implies minipix.
+        -a nt32|nt64        Selects 32-bit or 64-bit architecture; defaults to nt64.
+        -b debug|release    Selects debug or release build kind; defaults to debug.
+        -C dir[,..]         Clean build directory (build,) ${PREFIX} before processing build
+                            scripts (prefix,) source directory (src,) and/or destination
+                            directory (dest) after successful package builds.
+        -D kind[,..]        Produce minimal midipix distribution directory (minipix,) RPM
+                            binary packages (rpm,) and/or deployable distribution ZIP
+                            archive (zipdist.) zipdist implies minipix.
         -F ipv4|ipv6|offline
-                          Force IPv4 (ipv4) or IPv6 (ipv6) when downloading package
-                          archives and/or Git repositories or don't download either at all
-                          (offline.)
-        -h|--help         Show short/full help screen, respectively.
-        -p jobs|-P        Enables parallelisation at group-level, whenever applicable.
-                          The maximum count of jobs defaults to the number of logical
-                          processors on the host system divided by two (2.)
-
-                          If -R is not specified and at least one (1) package fails to
-                          build, all remaining package builds will be forcibly aborted.
-
-        -r ALL|LAST       Restart all packages or the last failed package and resume
-                          build, resp.
+                            Force IPv4 (ipv4) or IPv6 (ipv6) when downloading package
+                            archives and/or Git repositories or don't download either at all
+                            (offline.)
+        -h|--help           Show short/full help screen, respectively.
+        -p jobs|-P          Enables parallelisation at group-level, whenever applicable.
+                            The maximum count of jobs defaults to the number of logical
+                            processors on the host system divided by two (2.)
+
+                            If -R is not specified and at least one (1) package fails to
+                            build, all remaining package builds will be forcibly aborted.
+
+        -r ALL|LAST         Restart all packages or the last failed package and resume
+                            build, resp.
         -r [*[*[*]]]name[,..][:ALL|LAST|[^|<|<=|>|>=]step,..]
-                          Restart the specified comma-separated package(s) w/ inhibition
-                          of package build step state resetting completely (`ALL',) starting
-                          at the resp. last successfully executed build steps (`LAST',) or the
-                          specified comma-separated list of build steps, optionally subject
-                          concerning package name(s) and/or build step(s) to the below modifiers:
-
-                          Prepend name w/ `*' to automatically include dependencies, `**'
-                          to forcibly rebuild all dependencies, and `***' to forcibly
-                          rebuild all packages that depend on the specified package(s).
-
-                          Prepend step w/ `^' to filter build steps with, `<' or `<='
-                          to constrain build steps to below or below or equal with, resp.,
-                          `>' or `>=' to constrain build steps to above or above or equal
-                          with, resp.
-
-                          Currently defined build steps are:
-                          fetch_clean, fetch_download, fetch_extract, configure_clean,
-                          configure_patch_pre, configure_autotools, configure_patch,
-                          configure, build_clean, build, install_clean, install_subdirs,
-                          install_make, install_files, install_libs, install, install_rpm,
-                          and clean.
-
-                          Additionally, the following virtual steps are provided:
-                          @fetch, @configure, @build, @install, @clean, and finish.
-
-        -R                Ignore build failures, skip printing package logs, and continue
-                          building (relaxed mode.)
-
-        -v[v]             -v: log at info, notice, -vv: log at info, notice, verbose level.
-        -V level[,..]     Be verbose concerning any of:
-                          notice...: log at info, notice level (-v,)
-                          verbose..: log at info, notice, verbose level (implies notice) (-vv,)
-                          build....: always print package build logs (implies notice,)
-                          fileops..: log RTL file operations (implies notice,)
-                          install..: log RTL installation DSL operations (implies notice,)
-                          xtrace...: set xtrace during package builds (implies notice) (-x.)
-        -x                Set xtrace during package builds.
-
-        --as-needed       Don't build unless the midipix_build repository has received
-                          new commits.
-        --debug-minipix   Don't strip(1) minipix binaries to facilitate debugging minipix.
-        --dump-on-abort   Produce package environment dump files on build failure to be
-                          used in conjuction with pkg_shell.sh script (excludes -R.)
-        --reset-state     Reset package build step state on exit.
-
-        <group>[ ..]      One of: dev_packages, dist, host_deps, host_deps_rpm,
-                          host_toolchain, host_tools, minipix, native_packages,
-                          native_runtime, native_toolchain, native_tools.
-
-                          Prepend w/ `=' to inhibit group-group dependency expansion.
+                            Restart the specified comma-separated package(s) w/ inhibition
+                            of package build step state resetting completely (`ALL',) starting
+                            at the resp. last successfully executed build steps (`LAST',) or the
+                            specified comma-separated list of build steps, optionally subject
+                            concerning package name(s) and/or build step(s) to the below modifiers:
+
+                            Prepend name w/ `*' to automatically include dependencies, `**'
+                            to forcibly rebuild all dependencies, and `***' to forcibly
+                            rebuild all packages that depend on the specified package(s).
+
+                            Prepend step w/ `^' to filter build steps with, `<' or `<='
+                            to constrain build steps to below or below or equal with, resp.,
+                            `>' or `>=' to constrain build steps to above or above or equal
+                            with, resp.
+
+                            Currently defined build steps are:
+                            fetch_clean, fetch_download, fetch_extract, configure_clean,
+                            configure_patch_pre, configure_autotools, configure_patch,
+                            configure, build_clean, build, install_clean, install_subdirs,
+                            install_make, install_files, install_libs, install, install_rpm,
+                            and clean.
+
+                            Additionally, the following virtual steps are provided:
+                            @fetch, @configure, @build, @install, @clean, and finish.
+
+        -R                  Ignore build failures, skip printing package logs, and continue
+                            building (relaxed mode.)
+
+        -v                  Increase logging verbosity.
+        -V [+]tag|pat[,..]  Enable logging for messages with tag or pattern matching tags of:
+                            + (prefix)..: initialise tags with normal verbosity (implies normal) (see etc/build.theme,)
+                            all.........: log everything (see etc/build.theme,)
+                            clear|none..: log nothing,
+                            normal......: log at normal verbosity (see etc/build.theme,)
+                            verbose.....: log at increased verbosity (implies normal) (see etc/build.theme) (-v,)
+
+                            build.......: log package build logs,
+                            fileops.....: log RTL file operations,
+                            install.....: log RTL installation DSL operations,
+                            zipdist.....: log deployable distribution ZIP archive operations,
+                            xtrace......: set xtrace during package builds,
+
+                            fatal.......: fatal, unrecoverable errors,
+                            info........: informational messages,
+                            verbose.....: verbose informational messages,
+                            warning.....: warning messages possibly relating to imminent fatal, unrecoverable errors,
+
+                            build_*.....: general build messages (viz.: begin, finish, finish_time, vars,)
+                            group_*.....: build group messages (viz.: begin, finish,)
+                            pkg_*.......: package build messages (viz.: begin, faildump, finish, msg, skip, step, strip.)
+
+        --as-needed         Don't build unless the midipix_build repository has received
+                            new commits.
+        --debug-minipix     Don't strip(1) minipix binaries to facilitate debugging minipix.
+        --dump-on-abort     Produce package environment dump files on build failure to be
+                            used in conjuction with pkg_shell.sh script (excludes -R.)
+        --reset-state       Reset package build step state on exit.
+
+        <group>[ ..]        One of: dev_packages, dist, host_deps, host_deps_rpm,
+                            host_toolchain, host_tools, minipix, native_packages,
+                            native_runtime, native_toolchain, native_tools.
+
+                            Prepend w/ `=' to inhibit group-group dependency expansion.
 
         <variable name>=<variable override>[ ..]
-                          Override build or package variable.
+                            Override build or package variable.
 ```
   
 [Back to top](#table-of-contents)
diff --git a/etc/build.theme b/etc/build.theme
new file mode 100644
index 00000000..5485a368
--- /dev/null
+++ b/etc/build.theme
@@ -0,0 +1,84 @@
+#
+# Theme file for build.sh
+#
+
+#
+# {{{ ANSI attributes reference
+#
+# Attribute	Name 					Note
+# 0 		Reset or normal 			All attributes off
+# 1 		Bold or increased intensity	 	As with faint, the color change is a PC (SCO / CGA) invention.[30][better source needed]
+# 2 		Faint, decreased intensity, or dim 	May be implemented as a light font weight like bold.[31]
+# 4 		Underline 				Style extensions exist for Kitty, VTE, mintty and iTerm2.[32][33]
+# 7 		Reverse video or invert 		Swap foreground and background colors; inconsistent emulation[34]
+#
+# FG 	BG 	Colour name
+# 30 	40 	Black
+# 31 	41 	Red
+# 32 	42 	Green
+# 33 	43 	Yellow
+# 34 	44 	Blue
+# 35 	45 	Magenta
+# 36 	46 	Cyan
+# 37 	47 	White
+# 90 	100 	Bright Black (Gray)
+# 91 	101 	Bright Red
+# 92 	102 	Bright Green
+# 93 	103 	Bright Yellow
+# 94 	104 	Bright Blue
+# 95 	105 	Bright Magenta
+# 96 	106 	Bright Cyan
+# 97 	107 	Bright White
+# }}}
+#
+
+#
+# Tag sets
+#
+LOG_TAGS_all="build,fileop,install,zipdist,xtrace,fatal,info,verbose,warning,build_begin,build_finish,build_finish_time,build_vars,group_begin,group_finish,pkg_begin,pkg_faildump,pkg_finish,pkg_msg,pkg_skip,pkg_step,pkg_strip";
+LOG_TAGS_normal="fatal,info,warning,build_begin,build_finish,build_finish_time,pkg_begin,pkg_faildump,pkg_finish,pkg_msg";
+LOG_TAGS_verbose="${LOG_TAGS_normal:+${LOG_TAGS_normal},}verbose,build_vars,group_begin,group_finish,pkg_skip,pkg_step,pkg_strip";
+
+#
+# Subsystem tags
+#
+LOG_TAG_build="";		# (UNUSED)
+LOG_TAG_fileop=36;		# Cyan
+LOG_TAG_install=36;		# Cyan
+LOG_TAG_zipdist=93;		# Bright yellow
+LOG_TAG_xtrace="";		# (UNUSED)
+
+#
+# General level tags
+#
+LOG_TAG_fatal=91;		# Bright red
+LOG_TAG_info=93;		# Bright yellow
+LOG_TAG_verbose=96;		# Bright cyan
+LOG_TAG_warning=31;		# Dark red
+
+#
+# General build tags
+#
+LOG_TAG_build_begin=93;		# Bright yellow
+LOG_TAG_build_finish=93;	# Bright yellow
+LOG_TAG_build_finish_time=93;	# Bright yellow
+LOG_TAG_build_vars=33;		# Dark yellow
+
+#
+# Build group tags
+#
+LOG_TAG_group_begin=33;		# Dark yellow
+LOG_TAG_group_finish=32;	# Dark green
+
+#
+# Package build tags
+#
+LOG_TAG_pkg_begin=93;		# Bright yellow
+LOG_TAG_pkg_faildump=93;	# Bright yellow
+LOG_TAG_pkg_finish=92;		# Bright green
+LOG_TAG_pkg_msg=90;		# Dark grey
+LOG_TAG_pkg_skip=90;		# Dark grey
+LOG_TAG_pkg_step=90;		# Dark grey
+LOG_TAG_pkg_strip=93;		# Bright yellow
+
+# vim:foldmethod=marker ft=sh
diff --git a/etc/build.usage b/etc/build.usage
index 8bc7bdf6..218343d7 100644
--- a/etc/build.usage
+++ b/etc/build.usage
@@ -1,84 +1,97 @@
 [97musage[90m: [33m./[93mbuild.sh [90m[[33m-[93ma nt32[90m|[93mnt64[90m]  [[33m-[93mb debug[90m|[93mrelease[90m]    [[33m-[93mC dir[90m[[93m,[90m..]]  [[33m-[93mD kind[90m[[93m,[90m..]][0m
                   [90m[[33m-[93mF ipv4[90m|[93mipv6[90m|[93moffline[90m]    [[33m-[93mh[90m|[33m--[93mhelp[90m] [[33m-[93mp jobs[90m|[33m-[93mP[90m]    [[33m-[93mr ALL[90m|[93mLAST[90m][0m
                   [90m[[33m-[93mr [90m[[93m*[90m[[93m*[90m[[93m*[90m]]][93mname[90m[[93m,[90m..][[93m:ALL[90m|[93mLAST[90m|[[93m^[90m|[93m<[90m|[93m<=[90m|[93m>[90m|[93m>=[90m][93mstep,[90m..]]        [[33m-[93mR[90m]
-		  [90m[[33m-[93mv[90m[[93mv[90m]]   [[33m-[93mV [90m{[93mnotice[90m,[93mverbose[90m,[93mbuild[90m,[93mfileops[90m,[93minstall[90m,[93mxtrace[90m}]   [90m[[33m-[93mx[90m][0m
+		  [90m[[33m-[93mv[90m] [[33m-[93mV [90m[[93m+[90m][93mtag[90m|[93mpat[90m[[93m,[90m..][90m][0m
 
                   [90m[[33m--[93mas-needed[90m]  [90m[[33m--[93mdebug-minipix[90m] [[33m--[93mdump-on-abort[90m]  [90m[[33m--[93mreset-state[90m][0m
                   [90m[[33m--[93mroar[90m]      [[[93m=[90m][90m<[93mgroup[90m>|<[93mvariable name[90m>[93m=[90m<[93mvariable override[90m>[ ..]][0m
 
-        [33m-[93ma nt32[90m|[93mnt64[0m      [96mSelects 32-bit or 64-bit architecture; defaults to [93mnt64[96m.[0m
-        [33m-[93mb debug[90m|[93mrelease[0m  [96mSelects debug or release build kind; defaults to [93mdebug[96m.[0m
-        [33m-[93mC dir[90m[[93m,[90m..][0m       [96mClean build directory ([93mbuild[96m,) [93m${PREFIX}[96m before processing build[0m
-                          [96mscripts ([93mprefix[96m,) source directory ([93msrc[96m,) and/or destination[0m
-                          [96mdirectory ([93mdest[96m) after successful package builds.[0m
-        [33m-[93mD kind[90m[[93m,[90m..][0m      [96mProduce minimal midipix distribution directory ([93mminipix[96m,) RPM[0m
-                          [96mbinary packages ([93mrpm[96m,) and/or deployable distribution ZIP[0m
-                          [96marchive ([93mzipdist[96m.) [93mzipdist[96m implies [93mminipix[96m.[0m
+        [33m-[93ma nt32[90m|[93mnt64[0m        [96mSelects 32-bit or 64-bit architecture; defaults to [93mnt64[96m.[0m
+        [33m-[93mb debug[90m|[93mrelease[0m    [96mSelects debug or release build kind; defaults to [93mdebug[96m.[0m
+        [33m-[93mC dir[90m[[93m,[90m..][0m         [96mClean build directory ([93mbuild[96m,) [93m${PREFIX}[96m before processing build[0m
+                            [96mscripts ([93mprefix[96m,) source directory ([93msrc[96m,) and/or destination[0m
+                            [96mdirectory ([93mdest[96m) after successful package builds.[0m
+        [33m-[93mD kind[90m[[93m,[90m..][0m        [96mProduce minimal midipix distribution directory ([93mminipix[96m,) RPM[0m
+                            [96mbinary packages ([93mrpm[96m,) and/or deployable distribution ZIP[0m
+                            [96marchive ([93mzipdist[96m.) [93mzipdist[96m implies [93mminipix[96m.[0m
         [33m-[93mF ipv4[90m|[93mipv6[90m|[93moffline[0m
-                          [96mForce IPv4 ([93mipv4[96m) or IPv6 ([93mipv6[96m) when downloading package[0m
-                          [96marchives and/or Git repositories or don't download either at all[0m
-                          [96m([93moffline[96m.)[0m
-        [33m-[93mh[90m|[93m--help[0m         [96mShow short/full help screen, respectively.[0m
-        [33m-[93mp jobs[90m|[93m-P[0m        [96mEnables parallelisation at group-level, whenever applicable.[0m
-                          [96mThe maximum count of jobs defaults to the number of logical[0m
-                          [96mprocessors on the host system divided by two (2.)[0m
-
-                          [96mIf [33m-[93mR[96m is not specified and at least one (1) package fails to[0m
-                          [96mbuild, all remaining package builds will be forcibly aborted.[0m
-
-        [33m-[93mr ALL[90m|[93mLAST[0m       [96mRestart all packages or the last failed package and resume[0m
-                          [96mbuild, resp.[0m
+                            [96mForce IPv4 ([93mipv4[96m) or IPv6 ([93mipv6[96m) when downloading package[0m
+                            [96marchives and/or Git repositories or don't download either at all[0m
+                            [96m([93moffline[96m.)[0m
+        [33m-[93mh[90m|[93m--help[0m           [96mShow short/full help screen, respectively.[0m
+        [33m-[93mp jobs[90m|[93m-P[0m          [96mEnables parallelisation at group-level, whenever applicable.[0m
+                            [96mThe maximum count of jobs defaults to the number of logical[0m
+                            [96mprocessors on the host system divided by two (2.)[0m
+
+                            [96mIf [33m-[93mR[96m is not specified and at least one (1) package fails to[0m
+                            [96mbuild, all remaining package builds will be forcibly aborted.[0m
+
+        [33m-[93mr ALL[90m|[93mLAST[0m         [96mRestart all packages or the last failed package and resume[0m
+                            [96mbuild, resp.[0m
         [33m-[93mr [90m[[93m*[90m[[93m*[90m[[93m*[90m]]][93mname[90m[[93m,[90m..][[93m:ALL[90m|[93mLAST[90m|[[93m^[90m|[93m<[90m|[93m<=[90m|[93m>[90m|[93m>=[90m][93mstep,[90m..][0m
-                          [96mRestart the specified comma-separated package(s) w/ inhibition[0m
-                          [96mof package build step state resetting completely ([90m`[93mALL[90m'[96m,) starting[0m
-                          [96mat the resp. last successfully executed build steps ([90m`[93mLAST[90m'[96m,) or the[0m
-                          [96mspecified comma-separated list of build steps, optionally subject[0m
-                          [96mconcerning package name(s) and/or build step(s) to the below modifiers:[0m
-
-                          [96mPrepend name w/ [90m`[93m*[90m'[96m to automatically include dependencies, [90m`[93m**[90m'[0m
-                          [96mto forcibly rebuild all dependencies, and [90m`[93m***[90m'[96m to forcibly[0m
-                          [96mrebuild all packages that depend on the specified package(s).[0m
-
-                          [96mPrepend step w/ [90m`[93m^[90m'[96m to filter build steps with, [90m`[93m<[90m'[96m or [90m`[93m<=[90m'[0m
-                          [96mto constrain build steps to below or below or equal with, resp.,[0m
-                          [90m`[93m>[90m'[96m or [90m`[93m>=[90m'[96m to constrain build steps to above or above or equal[0m
-                          [96mwith, resp.[0m
-
-                          [96mCurrently defined build steps are:[0m
-                          [93mfetch_clean[90m,[93m fetch_download[90m,[93m fetch_extract[90m,[93m configure_clean[90m,[0m
-                          [93mconfigure_patch_pre[90m,[93m configure_autotools[90m,[93m configure_patch[90m,[0m
-                          [93mconfigure[90m,[93m build_clean[90m,[93m build[90m,[93m install_clean[90m,[93m install_subdirs[90m,[0m
-                          [93minstall_make[90m,[93m install_files[90m,[93m install_libs[90m,[93m install[90m,[93m install_rpm[90m,[0m
-                          [96mand [93mclean[90m.[0m
-
-                          [96mAdditionally, the following virtual steps are provided:[0m
-                          [93m@fetch[90m,[93m @configure[90m,[93m @build[90m,[93m @install[90m,[93m @clean[90m,[96m and [93mfinish[90m.[0m
-
-        [33m-[93mR[0m                [96mIgnore build failures, skip printing package logs, and continue[0m
-                          [96mbuilding (relaxed mode.)[0m
-
-        [33m-[93mv[90m[[93mv[90m][96m             [33m-[93mv[96m: log at [93minfo[90m, [93mnotice[96m, [33m-[93mvv[96m: log at [93minfo[90m,[93m notice[90m,[93m verbose[96m level.[0m
-        [33m-[93mV level[90m[[93m,[90m..][0m     [96mBe verbose concerning any of:[0m
-                          [93mnotice[90m...: [96mlog at [93minfo[90m, [93mnotice[96m level ([33m-[93mv[96m,)[0m
-                          [93mverbose[90m..: [96mlog at [93minfo[90m,[93m notice[90m,[93m verbose[96m level (implies [93mnotice[96m) ([33m-[93mvv[96m,)[0m
-                          [93mbuild[90m....: [96malways print package build logs (implies [93mnotice[96m,)[0m
-                          [93mfileops[90m..: [96mlog RTL file operations (implies [93mnotice[96m,)[0m
-                          [93minstall[90m..: [96mlog RTL installation DSL operations (implies [93mnotice[96m,)[0m
-                          [93mxtrace[90m...: [96mset [93mxtrace[96m during package builds (implies [93mnotice[96m) ([33m-[93mx[96m.)[0m
-        [33m-[93mx[96m                Set [93mxtrace[96m during package builds.[0m
-
-        [33m--[93mas-needed[0m       [96mDon't build unless the midipix_build repository has received[0m
-                          [96mnew commits.[0m
-        [33m--[93mdebug-minipix[0m   [96mDon't [93mstrip(1)[96m minipix binaries to facilitate debugging minipix.[0m
-        [33m--[93mdump-on-abort[0m   [96mProduce package environment dump files on build failure to be[0m
-                          [96mused in conjuction with pkg_shell.sh script (excludes [33m-[93mR[96m.)[0m
-        [33m--[93mreset-state[0m     [96mReset package build step state on exit.[0m
-
-        [90m<[93mgroup[90m>[ ..][96m      One of: [93mdev_packages[90m,[93m dist[90m,[93m host_deps[90m,[93m host_deps_rpm[90m,[0m
-                          [93mhost_toolchain[90m,[93m host_tools[90m,[93m minipix[90m,[93m native_packages[90m,[0m
-                          [93mnative_runtime[90m,[93m native_toolchain[90m,[93m native_tools[90m.[0m
-
-                          [96mPrepend w/ [90m`[93m=[90m'[96m to inhibit group-group dependency expansion.[0m
+                            [96mRestart the specified comma-separated package(s) w/ inhibition[0m
+                            [96mof package build step state resetting completely ([90m`[93mALL[90m'[96m,) starting[0m
+                            [96mat the resp. last successfully executed build steps ([90m`[93mLAST[90m'[96m,) or the[0m
+                            [96mspecified comma-separated list of build steps, optionally subject[0m
+                            [96mconcerning package name(s) and/or build step(s) to the below modifiers:[0m
+
+                            [96mPrepend name w/ [90m`[93m*[90m'[96m to automatically include dependencies, [90m`[93m**[90m'[0m
+                            [96mto forcibly rebuild all dependencies, and [90m`[93m***[90m'[96m to forcibly[0m
+                            [96mrebuild all packages that depend on the specified package(s).[0m
+
+                            [96mPrepend step w/ [90m`[93m^[90m'[96m to filter build steps with, [90m`[93m<[90m'[96m or [90m`[93m<=[90m'[0m
+                            [96mto constrain build steps to below or below or equal with, resp.,[0m
+                            [90m`[93m>[90m'[96m or [90m`[93m>=[90m'[96m to constrain build steps to above or above or equal[0m
+                            [96mwith, resp.[0m
+
+                            [96mCurrently defined build steps are:[0m
+                            [93mfetch_clean[90m,[93m fetch_download[90m,[93m fetch_extract[90m,[93m configure_clean[90m,[0m
+                            [93mconfigure_patch_pre[90m,[93m configure_autotools[90m,[93m configure_patch[90m,[0m
+                            [93mconfigure[90m,[93m build_clean[90m,[93m build[90m,[93m install_clean[90m,[93m install_subdirs[90m,[0m
+                            [93minstall_make[90m,[93m install_files[90m,[93m install_libs[90m,[93m install[90m,[93m install_rpm[90m,[0m
+                            [96mand [93mclean[90m.[0m
+
+                            [96mAdditionally, the following virtual steps are provided:[0m
+                            [93m@fetch[90m,[93m @configure[90m,[93m @build[90m,[93m @install[90m,[93m @clean[90m,[96m and [93mfinish[90m.[0m
+
+        [33m-[93mR[0m                  [96mIgnore build failures, skip printing package logs, and continue[0m
+                            [96mbuilding (relaxed mode.)[0m
+
+        [33m-[93mv[90m                  [96mIncrease logging verbosity.[0m
+        [33m-[93mV [90m[[93m+[90m][93mtag[90m|[93mpat[90m[[93m,[90m..][0m  [96mEnable logging for messages with [93mtag[96m or [93mpat[96mtern matching tags of:[0m
+                            [93m+[90m (prefix)..: [96minitialise tags with [93mnormal[96m verbosity (implies [93mnormal[96m) (see [93metc/build.theme[90m,[96m)[0m
+                            [93mall[90m.........: [96mlog everything (see [93metc/build.theme[90m,[96m)[0m
+                            [93mclear|none[90m..: [96mlog nothing,[0m
+                            [93mnormal[90m......: [96mlog at normal verbosity (see [93metc/build.theme[90m,[96m)[0m
+                            [93mverbose[90m.....: [96mlog at increased verbosity (implies [93mnormal[96m) (see [93metc/build.theme[96m) ([33m-[93mv[90m,[96m)[0m
+
+                            [93mbuild[90m.......: [96mlog package build logs,[0m
+                            [93mfileops[90m.....: [96mlog RTL file operations,[0m
+                            [93minstall[90m.....: [96mlog RTL installation DSL operations,[0m
+                            [93mzipdist[90m.....: [96mlog deployable distribution ZIP archive operations,[0m
+                            [93mxtrace[90m......: [96mset [93mxtrace[96m during package builds,[0m
+
+                            [93mfatal[90m.......: [96mfatal, unrecoverable errors,[0m
+                            [93minfo[90m........: [96minformational messages,[0m
+                            [93mverbose[90m.....: [96mverbose informational messages,[0m
+                            [93mwarning[90m.....: [96mwarning messages possibly relating to imminent fatal, unrecoverable errors,[0m
+
+                            [93mbuild_*[90m.....: [96mgeneral build messages (viz.: [93mbegin[90m, [93mfinish[90m, [93mfinish_time[90m, [93mvars[90m,[96m)[0m
+                            [93mgroup_*[90m.....: [96mbuild group messages (viz.: [93mbegin[90m, [93mfinish[90m,[96m)[0m
+                            [93mpkg_*[90m.......: [96mpackage build messages (viz.: [93mbegin[90m, [93mfaildump[90m, [93mfinish[90m, [93mmsg[90m, [93mskip[90m, [93mstep[90m, [93mstrip[90m.[96m)[0m
+
+        [33m--[93mas-needed[0m         [96mDon't build unless the midipix_build repository has received[0m
+                            [96mnew commits.[0m
+        [33m--[93mdebug-minipix[0m     [96mDon't [93mstrip(1)[96m minipix binaries to facilitate debugging minipix.[0m
+        [33m--[93mdump-on-abort[0m     [96mProduce package environment dump files on build failure to be[0m
+                            [96mused in conjuction with pkg_shell.sh script (excludes [33m-[93mR[96m.)[0m
+        [33m--[93mreset-state[0m       [96mReset package build step state on exit.[0m
+
+        [90m<[93mgroup[90m>[ ..][96m        One of: [93mdev_packages[90m,[93m dist[90m,[93m host_deps[90m,[93m host_deps_rpm[90m,[0m
+                            [93mhost_toolchain[90m,[93m host_tools[90m,[93m minipix[90m,[93m native_packages[90m,[0m
+                            [93mnative_runtime[90m,[93m native_toolchain[90m,[93m native_tools[90m.[0m
+
+                            [96mPrepend w/ [90m`[93m=[90m'[96m to inhibit group-group dependency expansion.[0m
 
         [90m<[93mvariable name[90m>[93m=[90m<[93mvariable override[90m>[ ..][0m
-                          [96mOverride build or package variable.[0m
+                            [96mOverride build or package variable.[0m
diff --git a/etc/build.usage.short b/etc/build.usage.short
index 3a529ecc..7e58f8b5 100644
--- a/etc/build.usage.short
+++ b/etc/build.usage.short
@@ -1,31 +1,24 @@
 [97musage[90m: [33m./[93mbuild.sh [90m[[33m-[93ma nt32[90m|[93mnt64[90m]  [[33m-[93mb debug[90m|[93mrelease[90m]    [[33m-[93mC dir[90m[[93m,[90m..]]  [[33m-[93mD kind[90m[[93m,[90m..]][0m
                   [90m[[33m-[93mF ipv4[90m|[93mipv6[90m|[93moffline[90m]    [[33m-[93mh[90m|[33m--[93mhelp[90m] [[33m-[93mp jobs[90m|[33m-[93mP[90m]    [[33m-[93mr ALL[90m|[93mLAST[90m][0m
                   [90m[[33m-[93mr [90m[[93m*[90m[[93m*[90m[[93m*[90m]]][93mname[90m[[93m,[90m..][[93m:ALL[90m|[93mLAST[90m|[[93m^[90m|[93m<[90m|[93m<=[90m|[93m>[90m|[93m>=[90m][93mstep,[90m..]]        [[33m-[93mR[90m]
-		  [90m[[33m-[93mv[90m[[93mv[90m]]   [[33m-[93mV [90m{[93mnotice[90m,[93mverbose[90m,[93mbuild[90m,[93mfileops[90m,[93minstall[90m,[93mxtrace[90m}]   [90m[[33m-[93mx[90m][0m
+		  [90m[[33m-[93mv[90m] [[33m-[93mV [90m[[93m+[90m][93mtag[90m|[93mpat[90m[[93m,[90m..][90m][0m
 
                   [90m[[33m--[93mas-needed[90m]  [90m[[33m--[93mdebug-minipix[90m] [[33m--[93mdump-on-abort[90m]  [90m[[33m--[93mreset-state[90m][0m
                   [90m[[33m--[93mroar[90m]      [[[93m=[90m][90m<[93mgroup[90m>|<[93mvariable name[90m>[93m=[90m<[93mvariable override[90m>[ ..]][0m
 
-        [33m-[93ma nt32[90m|[93mnt64[0m      [96mSelects 32-bit or 64-bit architecture; defaults to [93mnt64[96m.[0m
-        [33m-[93mb debug[90m|[93mrelease[0m  [96mSelects debug or release build kind; defaults to [93mdebug[96m.[0m
-        [33m-[93mh[90m|[33m--[93mhelp[96m         Show short/full help screen, respectively.[0m
-        [33m-[93mp jobs[90m|[93m-P[96m        Enables parallelisation at group-level, whenever applicable.[0m
-        [33m-[93mr ALL[90m|[93mLAST[96m       Restart all/the last failed/the specified comma-separated package(s).[0m
+        [33m-[93ma nt32[90m|[93mnt64[0m        [96mSelects 32-bit or 64-bit architecture; defaults to [93mnt64[96m.[0m
+        [33m-[93mb debug[90m|[93mrelease[0m    [96mSelects debug or release build kind; defaults to [93mdebug[96m.[0m
+        [33m-[93mh[90m|[33m--[93mhelp[96m           Show short/full help screen, respectively.[0m
+        [33m-[93mp jobs[90m|[93m-P[96m          Enables parallelisation at group-level, whenever applicable.[0m
+        [33m-[93mr ALL[90m|[93mLAST[96m         Restart all/the last failed/the specified comma-separated package(s).[0m
         [33m-[93mr [90m[[93m*[90m[[93m*[90m[[93m*[90m]]][93mname[90m[[93m,[90m..][[93m:ALL[90m|[93mLAST[90m|[[93m^[90m|[93m<[90m|[93m<=[90m|[93m>[90m|[93m>=[90m][93mstep,[90m..][0m
-        [33m-[93mv[90m[[93mv[90m][96m             [33m-[93mv[96m: log at [93minfo[90m, [93mnotice[96m, [33m-[93mvv[96m: log at [93minfo[90m,[93m notice[90m,[93m verbose[96m level.[0m
-        [33m-[93mV level[90m[[93m,[90m..][0m     [96mBe verbose concerning any of:[0m
-                          [93mnotice[90m...: [96mlog at [93minfo[90m, [93mnotice[96m level ([33m-[93mv[96m,)[0m
-                          [93mverbose[90m..: [96mlog at [93minfo[90m,[93m notice[90m,[93m verbose[96m level (implies [93mnotice[96m) ([33m-[93mvv[96m,)[0m
-                          [93mbuild[90m....: [96malways print package build logs (implies [93mnotice[96m,)[0m
-                          [93mfileops[90m..: [96mlog RTL file operations (implies [93mnotice[96m,)[0m
-                          [93minstall[90m..: [96mlog RTL installation DSL operations (implies [93mnotice[96m,)[0m
-                          [93mxtrace[90m...: [96mset [93mxtrace[96m during package builds (implies [93mnotice[96m) ([33m-[93mx[96m.)[0m
+        [33m-[93mv[90m                  [96mIncrease logging verbosity.[0m
 
-        [90m<[93mgroup[90m>[ ..][96m      One of: [93mdev_packages[90m,[93m dist[90m,[93m host_deps[90m,[93m host_deps_rpm[90m,[0m
-                          [93mhost_toolchain[90m,[93m host_tools[90m,[93m minipix[90m,[93m native_packages[90m,[0m
-                          [93mnative_runtime[90m,[93m native_toolchain[90m,[93m native_tools[90m.[0m
+        [90m<[93mgroup[90m>[ ..][96m        One of: [93mdev_packages[90m,[93m dist[90m,[93m host_deps[90m,[93m host_deps_rpm[90m,[0m
+                            [93mhost_toolchain[90m,[93m host_tools[90m,[93m minipix[90m,[93m native_packages[90m,[0m
+                            [93mnative_runtime[90m,[93m native_toolchain[90m,[93m native_tools[90m.[0m
 
-                          [96mPrepend w/ [90m`[93m=[90m'[96m to inhibit group-group dependency expansion.[0m
+                            [96mPrepend w/ [90m`[93m=[90m'[96m to inhibit group-group dependency expansion.[0m
 
         [90m<[93mvariable name[90m>=<[93mvariable override[90m>[ ..][0m
-                          [96mOverride build or package variable.[0m
+                            [96mOverride build or package variable.[0m
diff --git a/etc/pkgtool.theme b/etc/pkgtool.theme
new file mode 100644
index 00000000..31ea331e
--- /dev/null
+++ b/etc/pkgtool.theme
@@ -0,0 +1,56 @@
+#
+# Theme file for pkgtool.sh
+#
+
+#
+# {{{ ANSI attributes reference
+#
+# Attribute	Name 					Note
+# 0 		Reset or normal 			All attributes off
+# 1 		Bold or increased intensity	 	As with faint, the color change is a PC (SCO / CGA) invention.[30][better source needed]
+# 2 		Faint, decreased intensity, or dim 	May be implemented as a light font weight like bold.[31]
+# 4 		Underline 				Style extensions exist for Kitty, VTE, mintty and iTerm2.[32][33]
+# 7 		Reverse video or invert 		Swap foreground and background colors; inconsistent emulation[34]
+#
+# FG 	BG 	Colour name
+# 30 	40 	Black
+# 31 	41 	Red
+# 32 	42 	Green
+# 33 	43 	Yellow
+# 34 	44 	Blue
+# 35 	45 	Magenta
+# 36 	46 	Cyan
+# 37 	47 	White
+# 90 	100 	Bright Black (Gray)
+# 91 	101 	Bright Red
+# 92 	102 	Bright Green
+# 93 	103 	Bright Yellow
+# 94 	104 	Bright Blue
+# 95 	105 	Bright Magenta
+# 96 	106 	Bright Cyan
+# 97 	107 	Bright White
+# }}}
+#
+
+#
+# Tag sets
+#
+LOG_TAGS_all="fileop,install,fatal,info,verbose,warning";
+LOG_TAGS_normal="fatal,info,warning";
+LOG_TAGS_verbose="${LOG_TAGS_normal:+${LOG_TAGS_normal},}verbose";
+
+#
+# Subsystem tags
+#
+LOG_TAG_fileop=36;		# Cyan
+LOG_TAG_install=36;		# Cyan
+
+#
+# General level tags
+#
+LOG_TAG_fatal=91;		# Bright red
+LOG_TAG_info=93;		# Bright yellow
+LOG_TAG_verbose=96;		# Bright cyan
+LOG_TAG_warning=31;		# Dark red
+
+# vim:foldmethod=marker ft=sh
diff --git a/pkgtool.sh b/pkgtool.sh
index debc873c..c8eb3510 100755
--- a/pkgtool.sh
+++ b/pkgtool.sh
@@ -15,20 +15,20 @@ pkgtoolp_info() {
 			"${_group_name}" 1 "${_pkg_name}" "" "${BUILD_WORKDIR}"; then
 		_rc=1; _status="Error: failed to set package environment for \`${_pkg_name}'.";
 	else	_pkg_version="$(rtl_get_var_unsafe -u "PKG_"${_pkg_name}"_VERSION")";
-		rtl_log_env_vars "notice" "package" $(rtl_get_vars_fast "^PKG_${_pkg_name_uc}");
-		rtl_log_msg info "Build group: %s" "${_group_name}";
+		rtl_log_env_vars "verbose" "package" $(rtl_get_vars_fast "^PKG_${_pkg_name_uc}");
+		rtl_log_msg "info" "Build group: %s" "${_group_name}";
 		if [ -z "${PKG_DEPENDS:-}" ]; then
-			rtl_log_msg info "Package \`%s' has no dependencies." "${_pkg_name}";
-		else	rtl_log_msg info "Direct dependencies of \`%s': %s" "${_pkg_name}" "${PKG_DEPENDS}";
+			rtl_log_msg "info" "Package \`%s' has no dependencies." "${_pkg_name}";
+		else	rtl_log_msg "info" "Direct dependencies of \`%s': %s" "${_pkg_name}" "${PKG_DEPENDS}";
 			if ! ex_pkg_unfold_depends 1 1 "${_group_name}" "${_pkg_names}" "${_pkg_name}" 0; then
-				rtl_log_msg warning "Warning: failed to unfold dependency-expanded package name list for \`%s'." "${_pkg_name}";
+				rtl_log_msg "warning" "Warning: failed to unfold dependency-expanded package name list for \`%s'." "${_pkg_name}";
 			else	EX_PKG_NAMES="$(rtl_lfilter "${EX_PKG_NAMES}" "${_pkg_name}")";
 				if [ -n "${EX_PKG_NAMES}" ]; then
-					rtl_log_msg info "Full dependencies of \`%s': %s"\
+					rtl_log_msg "info" "Full dependencies of \`%s': %s"\
 							"${_pkg_name}" "$(rtl_lsort "${EX_PKG_NAMES}")";
 				fi;
 				if [ -n "${EX_PKG_DISABLED}" ]; then
-					rtl_log_msg info "Full dependencies of \`%s' (disabled packages:) %s"\
+					rtl_log_msg "info" "Full dependencies of \`%s' (disabled packages:) %s"\
 							"${_pkg_name}" "$(rtl_lsort "${EX_PKG_DISABLED}")";
 				fi;
 			fi;
@@ -84,25 +84,25 @@ pkgtoolp_mirror_fetch() {
 
 	if _pkg_disabled="$(rtl_get_var_unsafe -u "PKG_${_pkg_name_real}_DISABLED")"\
 	&& [ "${_pkg_disabled:-0}" -eq 1 ]; then
-		rtl_log_msg notice "Package \`%s' (parent package: \`%s') disabled, skipping." "${_pkg_name}" "${_pkg_name_real}";
+		rtl_log_msg "verbose" "Package \`%s' (parent package: \`%s') disabled, skipping." "${_pkg_name}" "${_pkg_name_real}";
 	else	if _pkg_url="$(rtl_get_var_unsafe -u "PKG_${_pkg_name_real}_URL")"\
 		&& _pkg_sha256sum="$(rtl_get_var_unsafe -u "PKG_${_pkg_name_real}_SHA256SUM")"; then
 			if [ -z "${_mirror_dname}" ]; then
-				_rc=0; rtl_log_msg notice "Archive URL(s) mirroring disabled, skipping \`%s'." "${_pkg_name}";
+				_rc=0; rtl_log_msg "verbose" "Archive URL(s) mirroring disabled, skipping \`%s'." "${_pkg_name}";
 			elif [ "${_pkg_name}" != "${_pkg_name_real}" ]; then
-				rtl_log_msg info "Mirroring package \`%s' (parent package: \`%s'), archive URL(s): \`%s'..." "${_pkg_name}" "${_pkg_name_real}" "${_pkg_url}";
+				rtl_log_msg "info" "Mirroring package \`%s' (parent package: \`%s'), archive URL(s): \`%s'..." "${_pkg_name}" "${_pkg_name_real}" "${_pkg_url}";
 				if ! rtl_fileop ln_symbolic "${_pkg_name_real}" "${_mirror_dname}/${_pkg_name}"; then
-					_rc=1; rtl_log_msg warning "Failed to create symbolic link \`%s' for package \`%s' w/ parent package \`%s'."\
+					_rc=1; rtl_log_msg "warning" "Failed to create symbolic link \`%s' for package \`%s' w/ parent package \`%s'."\
 							"${_mirror_dname}/${_pkg_name}" "${_pkg_name}" "${_pkg_name_real}";
 				fi;
 			else
 				if ! _pkg_fname="$(rtl_get_var_unsafe -u "PKG_${_pkg_name_real}_FNAME")"; then
 					_pkg_fname="${_pkg_url##*/}";
 				fi;
-				rtl_log_msg info "Mirroring package \`%s', archive URL(s): \`%s'..." "${_pkg_name}" "${_pkg_url}";
+				rtl_log_msg "info" "Mirroring package \`%s', archive URL(s): \`%s'..." "${_pkg_name}" "${_pkg_url}";
 				if ! rtl_fileop mkdir "${_mirror_dname}/${_pkg_name}"\
 				|| ! rtl_fetch_url_wget "${_pkg_url}" "${_pkg_sha256sum}" "${_mirror_dname}/${_pkg_name}" "${_pkg_fname}" "${_pkg_name_real}" ""; then
-					_rc=1; rtl_log_msg warning "Failed to mirror package \`%s', skipping." "${_pkg_name}";
+					_rc=1; rtl_log_msg "warning" "Failed to mirror package \`%s', skipping." "${_pkg_name}";
 				else
 					pkg_fetch_download_clean_dlcache "${_mirror_dname}" "${_pkg_name}" "${_pkg_fname}" "${_pkg_urls_git}";
 				fi;
@@ -110,20 +110,20 @@ pkgtoolp_mirror_fetch() {
 		fi;
 		if _pkg_urls_git="$(rtl_get_var_unsafe -u "PKG_${_pkg_name_real}_URLS_GIT")"; then
 			if [ -z "${_mirror_dname_git}" ]; then
-				_rc=0; rtl_log_msg notice "Git URL(s) mirroring disabled, skipping \`%s'." "${_pkg_name}";
+				_rc=0; rtl_log_msg "verbose" "Git URL(s) mirroring disabled, skipping \`%s'." "${_pkg_name}";
 			elif [ "$(rtl_get_var_unsafe -u "PKG_${_pkg_name_real}_MIRRORS_GIT")" = "skip" ]; then
-				_rc=0; rtl_log_msg notice "Package \`%s' specifies to skip Git URL(s) mirroring, skipping." "${_pkg_name}";
+				_rc=0; rtl_log_msg "verbose" "Package \`%s' specifies to skip Git URL(s) mirroring, skipping." "${_pkg_name}";
 			elif [ "${_pkg_name}" != "${_pkg_name_real}" ]; then
-				rtl_log_msg info "Mirroring package \`%s' (parent package: \`%s'), Git URL(s): \`%s'..." "${_pkg_name}" "${_pkg_name_real}" "${_pkg_urls_git}";
+				rtl_log_msg "info" "Mirroring package \`%s' (parent package: \`%s'), Git URL(s): \`%s'..." "${_pkg_name}" "${_pkg_name_real}" "${_pkg_urls_git}";
 				if ! rtl_fileop ln_symbolic "${_pkg_name_real}" "${_mirror_dname_git}/${_pkg_name}"; then
-					_rc=1; rtl_log_msg warning "Failed to create symbolic link \`%s' for package \`%s' w/ parent package \`%s'."\
+					_rc=1; rtl_log_msg "warning" "Failed to create symbolic link \`%s' for package \`%s' w/ parent package \`%s'."\
 							"${_mirror_dname_git}/${_pkg_name}" "${_pkg_name}" "${_pkg_name_real}";
 				fi;
 			else
-				rtl_log_msg info "Mirroring package \`%s', Git URL(s): \`%s'..." "${_pkg_name}" "${_pkg_urls_git}";
+				rtl_log_msg "info" "Mirroring package \`%s', Git URL(s): \`%s'..." "${_pkg_name}" "${_pkg_urls_git}";
 				if ! rtl_fileop mkdir "${_mirror_dname_git}/${_pkg_name}"\
 				|| ! rtl_fetch_mirror_urls_git "${DEFAULT_GIT_ARGS}" "${_mirror_dname_git}/${_pkg_name}" ${_pkg_urls_git}; then
-					_rc=1; rtl_log_msg warning "Failed to mirror package \`%s', skipping." "${_pkg_name}";
+					_rc=1; rtl_log_msg "warning" "Failed to mirror package \`%s', skipping." "${_pkg_name}";
 				else
 					pkg_fetch_download_clean_dlcache "${_mirror_dname_git}" "${_pkg_name}" "${_pkg_fname}" "${_pkg_urls_git}";
 				fi;
@@ -132,7 +132,7 @@ pkgtoolp_mirror_fetch() {
 		if [ -z "${_pkg_url}" ]\
 		&& [ -z "${_pkg_sha256sum}" ]\
 		&& [ -z "${_pkg_urls_git}" ]; then
-			_rc=0; rtl_log_msg notice "Package \`%s' has neither archive nor Git URL(s), skipping." "${_pkg_name}";
+			_rc=0; rtl_log_msg "verbose" "Package \`%s' has neither archive nor Git URL(s), skipping." "${_pkg_name}";
 		fi;
 	fi; return "${_rc}";
 };
@@ -164,7 +164,7 @@ pkgtoolp_rdepends() {
 	elif ! ex_pkg_unfold_rdepends_direct "${_group_name}" "${_pkg_names}" "${_pkg_name}"; then
 		_rc=1; _status="Error: failed to unfold reverse dependency-expanded package name list for \`${_pkg_name}'.";
 	elif [ -z "${EX_PKG_DISABLED}" ] && [ -z "${EX_PKG_RDEPENDS_DIRECT}" ]; then
-		rtl_log_msg info "Package \`%s' has no reverse dependencies." "${_pkg_name}";
+		rtl_log_msg "info" "Package \`%s' has no reverse dependencies." "${_pkg_name}";
 	else	for _pkg_name_rdepend in $(rtl_lsort "${EX_PKG_RDEPENDS_DIRECT}"); do
 			_pkg_rdepends="$(rtl_lconcat "${_pkg_rdepends}" "${_pkg_name_rdepend}")";
 			if _pkg_depends="$(rtl_lunfold_depends 'PKG_${_name}_DEPENDS' $(rtl_get_var_unsafe -u "PKG_"${_pkg_name}"_DEPENDS"))"\
@@ -173,10 +173,10 @@ pkgtoolp_rdepends() {
 			fi;
 		done;
 		if [ -n "${_pkg_rdepends}" ]; then
-			rtl_log_msg info "Reverse dependencies of \`%s': %s" "${_pkg_name}" "${_pkg_rdepends}";
+			rtl_log_msg "info" "Reverse dependencies of \`%s': %s" "${_pkg_name}" "${_pkg_rdepends}";
 		fi;
 		if [ -n "${EX_PKG_DISABLED}" ]; then
-			rtl_log_msg info "Reverse dependencies of \`%s' (disabled packages:) %s"\
+			rtl_log_msg "info" "Reverse dependencies of \`%s' (disabled packages:) %s"\
 					"${_pkg_name}" "$(rtl_lsort "${EX_PKG_DISABLED}")";
 		fi;
 	fi; return "${_rc}";
@@ -186,11 +186,11 @@ pkgtoolp_shell() {
 	local _pkg_name="${1}" _rc=0; _status="";
 	if ! ex_pkg_load_dump "${_pkg_name}" "${BUILD_WORKDIR}"; then
 		_rc=1; _status="${_status}";
-	else	rtl_log_env_vars "notice" "package" $(rtl_get_vars_fast "^PKG_");
-		rtl_log_msg info "Launching shell \`%s' within package environment and \`%s'." "${SHELL}" "${PKG_BUILD_DIR}";
-		rtl_log_msg info "Run \$R to rebuild \`%s'." "${_pkg_name}";
-		rtl_log_msg info "Run \$RS <step> to restart the specified build step of \`%s'" "${_pkg_name}";
-		rtl_log_msg info "Run \$D to automatically regenerate the patch for \`%s'." "${_pkg_name}";
+	else	rtl_log_env_vars "verbose" "package" $(rtl_get_vars_fast "^PKG_");
+		rtl_log_msg "info" "Launching shell \`%s' within package environment and \`%s'." "${SHELL}" "${PKG_BUILD_DIR}";
+		rtl_log_msg "info" "Run \$R to rebuild \`%s'." "${_pkg_name}";
+		rtl_log_msg "info" "Run \$RS <step> to restart the specified build step of \`%s'" "${_pkg_name}";
+		rtl_log_msg "info" "Run \$D to automatically regenerate the patch for \`%s'." "${_pkg_name}";
 		export	ARCH BUILD_KIND						\
 			BUILD_DLCACHEDIR BUILD_WORKDIR				\
 			MAKE="make LIBTOOL=${PKG_LIBTOOL:-slibtool}"		\
@@ -225,7 +225,7 @@ pkgtoolp_tarball() {
 			_pkg_name_full="${_pkg_name}";
 		fi;
 		_tarball_fname="${_pkg_name_full}@${_hname}-${_date}.tbz2";
-		rtl_log_msg info "Creating compressed tarball of \`%s' and \`%s_stderrout.log'..."\
+		rtl_log_msg "info" "Creating compressed tarball of \`%s' and \`%s_stderrout.log'..."\
 				"${PKG_BASE_DIR}" "${_pkg_name}";
 		if ! tar -C "${BUILD_WORKDIR}" -cpf -				\
 				"${PKG_BASE_DIR#${BUILD_WORKDIR%/}/}"		\
@@ -233,7 +233,7 @@ pkgtoolp_tarball() {
 					bzip2 -c -9 - > "${_tarball_fname}"; then
 			_rc=1; _status="Error: failed to create compressed tarball of \`${PKG_BASE_DIR}' and \`${_pkg_name}_stderrout.log'.";
 		else
-			rtl_log_msg info "Created compressed tarball of \`%s' and \`%s_stderrout.log'."\
+			rtl_log_msg "info" "Created compressed tarball of \`%s' and \`%s_stderrout.log'."\
 					"${PKG_BASE_DIR}" "${_pkg_name}";
 		fi;
 	fi; return "${_rc}";
@@ -266,7 +266,7 @@ pkgtoolp_update_diff() {
 			elif ! rtl_fileop mv "${_diff_fname_src}" "${MIDIPIX_BUILD_PWD}/patches/${_diff_fname_dst}"; then
 				_rc=1; _status="Error: failed to rename diff(1) to \`${MIDIPIX_BUILD_PWD}/patches/${_diff_fname_dst}'.";
 			else	trap - EXIT HUP INT TERM USR1 USR2;
-				rtl_log_msg info "Updated \`%s/patches/%s'."\
+				rtl_log_msg "info" "Updated \`%s/patches/%s'."\
 						"${MIDIPIX_BUILD_PWD}" "${_diff_fname_dst}";
 			fi;
 		fi;
@@ -290,9 +290,9 @@ pkgtool() {
 		esac; _rc="${?}";
 	fi;
 	if [ "${_rc}" -ne 0 ]; then
-		rtl_log_msg fatalexit "${_status}";
+		rtl_log_msg "fatalexit" "${_status}";
 	elif [ -n "${_status}" ]; then
-		rtl_log_msg info "${_status}";
+		rtl_log_msg "info" "${_status}";
 	fi;
 };
 
diff --git a/subr.rtl/rtl_fetch.subr b/subr.rtl/rtl_fetch.subr
index c8e12d1b..461893b6 100644
--- a/subr.rtl/rtl_fetch.subr
+++ b/subr.rtl/rtl_fetch.subr
@@ -37,30 +37,30 @@ rtl_fetch_url_wget() {
 		case "${_rc}" in
 		0)	break; ;;
 		1)	if [ "${_urls_count}" -ge 1 ]; then
-				rtl_log_msg warning "Warning: failed to acquire fetching lock for URL \`%s', retrying with alternative URL..." "${_url}";
+				rtl_log_msg "warning" "Warning: failed to acquire fetching lock for URL \`%s', retrying with alternative URL..." "${_url}";
 			else
-				rtl_log_msg fatal "Error: failed to acquire fetching lock for URL \`%s'." "${_url}";
+				rtl_log_msg "fatal" "Error: failed to acquire fetching lock for URL \`%s'." "${_url}";
 				rtl_fileop rm "${_target_fname_full}"; break;
 			fi; ;;
 		2)	if [ "${_urls_count}" -ge 1 ]; then
-				rtl_log_msg warning "Warning: hash mismatch for URL \`%s', retrying with alternative URL... (from build variables: %s.)"\
+				rtl_log_msg "warning" "Warning: hash mismatch for URL \`%s', retrying with alternative URL... (from build variables: %s.)"\
 						"${_url}" "${_sha256sum_src}";
 			else
 				if _sha256sum_target="$(sha256sum "${_target_fname_full}" |\
 							awk '{print $1}' 2>/dev/null)"; then
-					rtl_log_msg fatal "Error: hash mismatch for URL \`%s' (should be: %s vs.: %s.)"\
+					rtl_log_msg "fatal" "Error: hash mismatch for URL \`%s' (should be: %s vs.: %s.)"\
 							"${_url}" "${_sha256sum_src}" "${_sha256sum_target}";
 				else
-					rtl_log_msg fatal "Error: hash mismatch for URL \`%s' (should be: %s.)"\
+					rtl_log_msg "fatal" "Error: hash mismatch for URL \`%s' (should be: %s.)"\
 							"${_url}" "${_sha256sum_src}";
 				fi;
 				rtl_fileop rm "${_target_fname_full}"; break;
 			fi; ;;
 		*)	if [ "${_urls_count}" -ge 1 ]; then
-				rtl_log_msg warning "Warning: failed to fetch URL \`%s', retrying with alternative URL... (wget(1) exit status: %s)"\
+				rtl_log_msg "warning" "Warning: failed to fetch URL \`%s', retrying with alternative URL... (wget(1) exit status: %s)"\
 						"${_url}" "$((${_rc}-2))";
 			else
-				rtl_log_msg fatal "Error: failed to fetch URL \`%s' (wget(1) exit status: %s)"\
+				rtl_log_msg "fatal" "Error: failed to fetch URL \`%s' (wget(1) exit status: %s)"\
 						"${_url}" "$((${_rc}-2))";
 				rtl_fileop rm "${_target_fname_full}"; break;
 			fi; ;;
diff --git a/subr.rtl/rtl_fileop.subr b/subr.rtl/rtl_fileop.subr
index d69cead7..4addffcd 100644
--- a/subr.rtl/rtl_fileop.subr
+++ b/subr.rtl/rtl_fileop.subr
@@ -3,10 +3,8 @@
 #
 
 #
-# Private globals and subroutines
+# Private subroutines
 #
-RTLP_FILEOP_LOG=0;
-rtl_fileop_set_log() { RTLP_FILEOP_LOG="${1}"; };
 
 rtlp_fileop_check() {
 	local _prefix="${1}" _pname="" _rname=""; shift;
@@ -16,38 +14,38 @@ rtlp_fileop_check() {
 };
 
 rtlp_fileop_log() {
-	local _msg="${1}";
-	if [ "${RTLP_FILEOP_LOG:-0}" -eq 1 ]; then
-		rtl_log_msg notice "${_msg}";
-	fi;
+	rtl_log_msg "fileop" "${1}";
 };
 
+#
+# Public subroutines
+#
 
 rtl_fileop() {
 	local _op="${1}" _dst="" _group="" _install_args="" _mode="" _owner="" _rc=0 _src=""; shift;
 	case "${_op}" in
 	cd)	if [ \( -z "${1}" \) -o ! \( -L "${1}" -o -e "${1}" \) ]; then
-			rtl_log_msg fatalexit "Invalid or non-existent directory \`%s'." "${1}";
+			rtl_log_msg "fatalexit" "Error: Invalid or non-existent directory \`%s'." "${1}";
 		elif rtlp_fileop_check "${PREFIX:-}" "${1}"; then
 			rtlp_fileop_log "Changing working directory to \`${1}'.";
 			cd -- "${1}"; _rc="${?}";
 		fi; ;;
 	chmod)	if [ "${#}" -lt 2 ]; then
-			rtl_log_msg fatalexit "Missing parameters (in: chmod %s.)" "${*}";
+			rtl_log_msg "fatalexit" "Error: Missing parameters (in: chmod %s.)" "${*}";
 		elif _mode="${1}" && shift\
 		&&   rtlp_fileop_check "${PREFIX:-}" "${*}"; then
 			rtlp_fileop_log "Changing file mode bits of \`${*}' to \`${_mode}'.";
 			chmod -- "${_mode}" "${@}"; _rc="${?}";
 		fi; ;;
 	chgrp)	if [ "${#}" -lt 2 ]; then
-			rtl_log_msg fatalexit "Missing parameters (in: chgrp %s.)" "${*}";
+			rtl_log_msg "fatalexit" "Error: Missing parameters (in: chgrp %s.)" "${*}";
 		elif _group="${1}" && shift\
 		&&   rtlp_fileop_check "${PREFIX:-}" "${*}"; then
 			rtlp_fileop_log "Changing file group of \`${*}' to \`${_group}'.";
 			chgrp -- "${_group}" "${@}"; _rc="${?}";
 		fi; ;;
 	chown)	if [ "${#}" -lt 2 ]; then
-			rtl_log_msg fatalexit "Missing parameters (in: chown %s.)" "${*}";
+			rtl_log_msg "fatalexit" "Error: Missing parameters (in: chown %s.)" "${*}";
 		elif _owner="${1}" && shift\
 		&&   rtlp_fileop_check "${PREFIX:-}" "${*}"; then
 			rtlp_fileop_log "Changing file owner of \`${*}' to \`${_owner}'.";
@@ -55,7 +53,7 @@ rtl_fileop() {
 		fi; ;;
 	cp_follow)
 		if [ "${#}" -lt 2 ]; then
-			rtl_log_msg fatalexit "Missing parameters (in: cp_follow %s}.)" "${*}";
+			rtl_log_msg "fatalexit" "Error: Missing parameters (in: cp_follow %s}.)" "${*}";
 		elif rtlp_fileop_check "${PREFIX:-}" "${*}"; then
 			_src="${*}"; _src="${_src% *}";
 			_dst="${*}"; _dst="${_dst##* }";
@@ -63,7 +61,7 @@ rtl_fileop() {
 			cp -pLR -- "${@}"; _rc="${?}";
 		fi; ;;
 	cp)	if [ "${#}" -lt 2 ]; then
-			rtl_log_msg fatalexit "Missing parameters (in: cp %s.)" "${*}";
+			rtl_log_msg "fatalexit" "Error: Missing parameters (in: cp %s.)" "${*}";
 		elif rtlp_fileop_check "${PREFIX:-}" "${*}"; then
 			_src="${*}"; _src="${_src% *}";
 			_dst="${*}"; _dst="${_dst##* }";
@@ -72,7 +70,7 @@ rtl_fileop() {
 		fi; ;;
 	install)
 		if [ "${#}" -lt 2 ]; then
-			rtl_log_msg fatalexit "Missing parameters (in: install %s.)" "${*}";
+			rtl_log_msg "fatalexit" "Error: Missing parameters (in: install %s.)" "${*}";
 		else	_dst="$(while [ ""${#}"" -gt 2 ]; do shift; done; printf "%s" "${2}")";
 			_install_args="$(while [ ""${#}"" -gt 2 ]; do printf "%s" "${1}"; shift; done)";
 			_src="$(while [ ""${#}"" -gt 2 ]; do shift; done; printf "%s" "${1}")";
@@ -83,7 +81,7 @@ rtl_fileop() {
 		fi; ;;
 	ln_symbolic)
 		if [ \( -z "${1}" \) -o \( -z "${2}" \) ]; then
-			rtl_log_msg fatalexit "Missing parameters (in: ln_symbolic %s.)" "${*}";
+			rtl_log_msg "fatalexit" "Error: Missing parameters (in: ln_symbolic %s.)" "${*}";
 		elif rtlp_fileop_check "${PREFIX:-}" "${2}"; then
 			if rtl_fileop test "${2}"; then
 				rtl_fileop rm "${2}";
@@ -94,13 +92,13 @@ rtl_fileop() {
 			fi;
 		fi; ;;
 	mv)	if [ \( -z "${1}" \) -o \( -z "${2}" \) ]; then
-			rtl_log_msg fatalexit "Missing parameters (in: mv %s.)" "${*}";
+			rtl_log_msg "fatalexit" "Error: Missing parameters (in: mv %s.)" "${*}";
 		elif rtlp_fileop_check "${PREFIX:-}" "${1}" "${2}"; then
 			rtlp_fileop_log "Moving \`${1}' to \`${2}' w/ -fs";
 			mv -f -- "${1}" "${2}"; _rc="${?}";
 		fi; ;;
 	touch)	if [ -z "${1}" ]; then
-			rtl_log_msg fatalexit "Missing parameters (in: touch %s.)" "${*}";
+			rtl_log_msg "fatalexit" "Error: Missing parameters (in: touch %s.)" "${*}";
 		elif rtlp_fileop_check "${PREFIX:-}" "${1}"; then
 			rtlp_fileop_log "Touching file \`${1}'${2:+ w/ timestamp \`${2}\'}.";
 			touch ${2:+-t "${2}"} -- "${1}"; _rc="${?}";
@@ -108,7 +106,7 @@ rtl_fileop() {
 	mkdir|mkfifo|rm|source|source_opt|test)
 		while [ \( "${?}" -eq 0 \) -a \( ""${#}"" -gt 0 \) ]; do
 			if [ -z "${1}" ]; then
-				rtl_log_msg fatalexit "Missing parameters (in: %s %s.)" "${_op}" "${*}";
+				rtl_log_msg "fatalexit" "Error: Missing parameters (in: %s %s.)" "${_op}" "${*}";
 			elif [ "${_op}" = mkdir ]\
 			&& [ ! -d "${1}" ]\
 			&& rtlp_fileop_check "${PREFIX:-}" "${1}"; then
@@ -145,7 +143,7 @@ rtl_fileop() {
 				return 1;
 			fi; shift;
 		done; ;;
-	*)	rtl_log_msg fatalexit "Error: rtl_fileop() called w/ invalid parameter(s): %s" "${*}"; ;;
+	*)	rtl_log_msg "fatalexit" "Error: rtl_fileop() called w/ invalid parameter(s): %s" "${*}"; ;;
 	esac; return "${_rc}";
 };
 
diff --git a/subr.rtl/rtl_install_v2.subr b/subr.rtl/rtl_install_v2.subr
index 6d8881eb..210ade97 100644
--- a/subr.rtl/rtl_install_v2.subr
+++ b/subr.rtl/rtl_install_v2.subr
@@ -261,7 +261,7 @@ rtlp_install_rc() {
 
 	if [ "${_rir_nflag}" -eq 1 ]\
 	|| [ "${_rir_vflag}" -gt 0 ]; then
-		rtl_log_msg notice "%s" "${_rir_fn}${_rir_fn:+ ${*}}";
+		rtl_log_msg "install" "%s" "${_rir_fn}${_rir_fn:+ ${*}}";
 	fi;
 	if [ "${_rir_nflag}" -eq 0 ]; then
 		"${_rir_fn}" "${@}"; _rir_rc="${?}";
diff --git a/subr.rtl/rtl_list.subr b/subr.rtl/rtl_list.subr
index e24973e9..07d401b8 100644
--- a/subr.rtl/rtl_list.subr
+++ b/subr.rtl/rtl_list.subr
@@ -143,6 +143,19 @@ rtl_lsearch() {
 	printf "%s" "${_lnew}";
 };
 
+rtl_lsearch_patternl() {
+	local	_list="${1}" _pattern="${2}" _sep="${3:- }" IFS="${3:-${IFS:- }}"\
+		_litem="" _lnew="";
+	if [ -n "${_pattern}" ]; then
+		for _litem in ${_list}; do
+			if [ "${_litem#${_pattern}}" != "${_litem}" ]; then
+				_lnew="${_lnew:+${_lnew}${_sep}}${_litem}";
+			fi;
+		done;
+	fi;
+	printf "%s" "${_lnew}";
+};
+
 rtl_lsort() {
 	local _list="${1}" _sep="${2:- }";
 	printf "%s" "${_list}" | tr "${_sep}" "\n" | sort | paste -s -d "${_sep}";
diff --git a/subr.rtl/rtl_log.subr b/subr.rtl/rtl_log.subr
index 3e55ab85..0a1e275b 100644
--- a/subr.rtl/rtl_log.subr
+++ b/subr.rtl/rtl_log.subr
@@ -5,15 +5,14 @@
 #
 # Private globals and subroutines
 #
-RTLP_LOG_NO_ATTR=0;
+
 RTLP_LOG_FNAME="";
-RTLP_LOG_LVL="0";
-rtl_log_set_fname() { RTLP_LOG_FNAME="${1}"; };
-rtl_log_set_lvl() { RTLP_LOG_LVL="${1}"; };
-rtl_log_set_no_attr() { RTLP_LOG_NO_ATTR="${1}"; };
+RTLP_LOG_NO_ATTR=0;
+RTLP_LOG_TAGS="";
 
 rtlp_log_printf() {
 	local _attr="${1}" _fmt="${2}"; shift 2; _msg="$(printf "${_fmt}" "${@}")";
+
 	if [ -n "${RTLP_LOG_FNAME}" ]; then
 		printf "%s\n" "${_msg}" >> "${RTLP_LOG_FNAME}";
 	fi;
@@ -21,59 +20,61 @@ rtlp_log_printf() {
 		printf "\033[0m\033[${_attr}m%s\033[0m\n" "${_msg}";
 	else
 		printf "%s\n" "${_msg}";
-	fi;
+	fi; return 0;
 };
 
 #
-# Public globals
+# Public subroutines
 #
-RTL_LOG_MSG_FATAL_COLOUR=91;		# Bright red
-RTL_LOG_MSG_WARNING_COLOUR=31;		# Dark red
-RTL_LOG_MSG_SUCCESS_COLOUR=33;		# Dark yellow
-RTL_LOG_MSG_SUCCESS_END_COLOUR=32;	# Dark green
-RTL_LOG_MSG_INFO_COLOUR=93;		# Bright yellow
-RTL_LOG_MSG_INFO_END_COLOUR=92;		# Bright green
-RTL_LOG_MSG_NOTICE_COLOUR=90;		# Dark grey
-RTL_LOG_MSG_VERBOSE_COLOUR=96;		# Bright cyan
-RTL_LOG_MSG_DEBUG_COLOUR=36;		# Dark cyan
 
+rtl_log_clear_tags() {
+	RTLP_LOG_TAGS=""; return 0;
+};
+
+rtl_log_enable_tags() {
+	local IFS=","; set -- ${*};
+	while [ "${#}" -gt 0 ]; do
+		if ! rtl_lmatch "${RTLP_LOG_TAGS}" "${1}" ","; then
+			RTLP_LOG_TAGS="${RTLP_LOG_TAGS:+${RTLP_LOG_TAGS},}${1}";
+		fi; shift;
+	done; return 0;
+};
 
 rtl_log_env_vars() {
-	local _level="${1}" _type="${2}" _arg_len_max=0; shift 2;
-	rtl_log_msg "${_level}" "Variables for this ${_type}:";
+	local _tag="${1}" _type="${2}" _arg_len_max=0; shift 2;
+
+	rtl_log_msg "${_tag}" "Variables for this ${_type}:";
 	_arg_len_max="$(rtl_lmax "${@}")";
 	while [ "${#}" -gt 0 ]; do
-		rtl_log_msg "${_level}"				\
+		rtl_log_msg "${_tag}"				\
 			"%${_arg_len_max}.${_arg_len_max}s=%s"	\
 			"${1%%=*}" "$(rtl_get_var_unsafe "${1#*=}")";
 		shift;
-	done;
+	done; return 0;
 };
 
 rtl_log_msg() {
-	local _lvl="${1}" _fmt="${2}" _attr=""; shift 2;
-	case "${RTLP_LOG_LVL:-0}" in
-	-1)	rtl_lmatch "info notice verbose debug" "${_lvl}" && return; ;;
-	0)	rtl_lmatch "notice verbose debug" "${_lvl}" && return; ;;
-	1)	rtl_lmatch "verbose debug" "${_lvl}" && return; ;;
-	2)	rtl_lmatch "debug" "${_lvl}" && return; ;;
-	3)	;;
-	esac;
-	case "${_lvl}" in
-	fatal|fatalexit)	_attr="${RTL_LOG_MSG_FATAL_COLOUR}"; ;;
-	warning)		_attr="${RTL_LOG_MSG_WARNING_COLOUR}"; ;;
-	success)		_attr="${RTL_LOG_MSG_SUCCESS_COLOUR}"; ;;
-	success_end)		_attr="${RTL_LOG_MSG_SUCCESS_END_COLOUR}"; ;;
-	info)			_attr="${RTL_LOG_MSG_INFO_COLOUR}"; ;;
-	info_end)		_attr="${RTL_LOG_MSG_INFO_END_COLOUR}"; ;;
-	notice)			_attr="${RTL_LOG_MSG_NOTICE_COLOUR}"; ;;
-	verbose)		_attr="${RTL_LOG_MSG_VERBOSE_COLOUR}"; ;;
-	debug)			_attr="${RTL_LOG_MSG_DEBUG_COLOUR}"; ;;
-	esac;
-	rtlp_log_printf "${_attr}" "==> %s ${_fmt}" "$(rtl_date)" "${@}";
-	if [ "x${_lvl}" = "xfatalexit" ]; then
-		exit 1;
-	fi;
+	local _tag="${1}" _fmt="${2}" _attr="" _exitfl=0; shift 2;
+
+	[ "x${_tag}" = "xfatalexit" ] && { _tag="fatal"; _exitfl=1; };
+	if rtl_lmatch "${RTLP_LOG_TAGS}" "${_tag}" ","; then
+		eval _attr='${LOG_TAG_'"${_tag}"':-}';
+		if [ "${#_attr}" -eq 0 ]; then
+			rtlp_log_printf "" "==> [4;41;97mFIXME TODO XXX UNKNOWN TAG \`%s' PASSED TO rtl_log_msg()[0m\n" "${_tag}";
+		fi;
+		rtlp_log_printf "${_attr}" "==> %s ${_fmt}" "$(rtl_date)" "${@}";
+		if [ "${_exitfl}" -eq 1 ]; then
+			exit 1;
+		fi;
+	fi; return 0;
+};
+
+rtl_log_set_fname() {
+	RTLP_LOG_FNAME="${1}"; return 0;
+};
+
+rtl_log_set_no_attr() {
+	RTLP_LOG_NO_ATTR="${1}"; return 0;
 };
 
 # vim:filetype=sh
diff --git a/subr.rtl/rtl_platform.subr b/subr.rtl/rtl_platform.subr
index d510254a..af3365eb 100644
--- a/subr.rtl/rtl_platform.subr
+++ b/subr.rtl/rtl_platform.subr
@@ -86,9 +86,9 @@ rtl_rc() {
 	local _nflag="${1}" _cmd="${2}"; shift 2;
 	case "${_nflag}" in
 	1)	     if [ "${#}" -gt 0 ]; then
-			rtl_log_msg verbose "Command line: %s %s" "${_cmd}" "${*}";
+			rtl_log_msg "verbose" "Command line: %s %s" "${_cmd}" "${*}";
 		else
-			rtl_log_msg verbose "Command line: %s" "${_cmd}";
+			rtl_log_msg "verbose" "Command line: %s" "${_cmd}";
 		fi; ;;
 	*)	"${_cmd}" "${@}";
 	esac;
diff --git a/subr/build_init.subr b/subr/build_init.subr
index c677f3ab..a6939b2a 100644
--- a/subr/build_init.subr
+++ b/subr/build_init.subr
@@ -14,18 +14,18 @@ buildp_init_args() {
 	esac;
 	if [ "${BUILD_HNAME:+1}" != 1 ]\
 	&& ! BUILD_HNAME="$(hostname)"; then
-		_rc=1; _status="Error: failed to obtain hostname.";
+		_rc=1; _status="failed to obtain hostname.";
 	elif [ "${ARG_DUMP_ON_ABORT:-0}" -eq 1 ]\
 	&&   [ "${ARG_RELAXED:-0}" -eq 1 ]; then
-		_rc=1; _status="Error: --dump-on-abort excludes -R.";
+		_rc=1; _status="--dump-on-abort excludes -R.";
 	elif [ "${ARG_AS_NEEDED:-0}" -eq 1 ]\
 	&&   [ -e "${PREFIX}/build.gitref" ]\
 	&&   [ "$(git rev-parse HEAD)" = "$(cat "${PREFIX}/build.gitref")" ]; then
 		_rc=0; _status="Git repository has not changed since last build and --as-needed was specified.";
 	elif ! ex_pkg_process_restart_spec \$ARG_RESTART \$ARG_RESTART_AT \$ARG_RESTART_RECURSIVE; then
-		_rc=1; _status="Error: failed to process -r specification: ${_status}.";
+		_rc=1; _status="failed to process -r specification: ${_status}.";
 	elif ! ex_pkg_load_groups; then
-		_rc=1; _status="Error: failed to load build groups.";
+		_rc=1; _status="failed to load build groups.";
 	else	if ! rtl_lmatch "${ARG_DIST:-}" "rpm" ","\
 		&& [ "${ARG_DUMP_IN:+1}" != 1 ]\
 		&& [ "${ARG_DUMP_ON_ABORT:-0}" -eq 0 ]; then
@@ -41,7 +41,7 @@ buildp_init_args() {
 			if [ "${_foundfl}" -eq 0 ]; then
 				_foundfl=0; for _group in ${BUILD_GROUPS}; do
 					if rtl_lmatch "${EX_PKG_BUILD_GROUPS}" "${_group}"; then
-						_rc=1; _status="Error: unknown build group \`${_group}'."; break;
+						_rc=1; _status="unknown build group \`${_group}'."; break;
 					fi;
 				done;
 			fi;
@@ -59,8 +59,8 @@ buildp_init_args() {
 				done;
 				case "$(rtl_llength "${_pkg_names_unknown}")" in
 				0)	;;
-				1)	_rc=1; _status="Error: unknown package \`${_pkg_names_unknown}'."; ;;
-				*)	_rc=1; _status="Error: unknown packages: $(rtl_subst "${_pkg_names_unknown}" " " ", ")"; ;;
+				1)	_rc=1; _status="unknown package \`${_pkg_names_unknown}'."; ;;
+				*)	_rc=1; _status="unknown packages: $(rtl_subst "${_pkg_names_unknown}" " " ", ")"; ;;
 				esac;
 			fi;
 		fi;
@@ -76,9 +76,14 @@ buildp_init_env() {
 		printf "Error: failed to set umask(2).\n" >&2; exit 1;
 	elif ! BUILD_USER="$(id -nu)"; then
 		printf "Error: failed to obtain username." >&2; exit 1;
-	else	for _fname in $(find subr.rtl -name *.subr) $(find subr -name *.subr); do
+	else	for _fname in	\
+				$(find subr.rtl -name *.subr)	\
+				$(find subr -name *.subr)	\
+				etc/build.theme			\
+				;
+		do
 			if ! . "${_fname}"; then
-				printf "Error: failed to source \`%s'.\n" "${_fname}"; exit 1;
+				printf "Error: failed to source \`%s'.\n" "${_fname}" >&2; exit 1;
 			fi;
 		done;
 	fi; return "${_rc}";
@@ -90,11 +95,11 @@ buildp_init_files() {
 	if ! rtl_fileop mkdir "${BUILD_DLCACHEDIR}" "${BUILD_WORKDIR}"\
 	|| rtl_lmatch "${ARG_DIST}" "rpm" ","\
 	&& ! rtl_fileop mkdir "${PREFIX_RPM}"; then
-		_rc=1; _status="Error: cannot create build directories.";
+		_rc=1; _status="cannot create build directories.";
 	elif [ -e "${DEFAULT_BUILD_STATUS_IN_PROGRESS_FNAME}" ]; then
-		_rc=1; _status="Error: another build targeting this architecture and build type is currently in progress.";
+		_rc=1; _status="another build targeting this architecture and build type is currently in progress.";
 	elif ! rtl_clean_env "${DEFAULT_CLEAR_ENV_VARS_EXCEPT}"; then
-		_rc=1; _status="Error: failed to clean environment.";
+		_rc=1; _status="failed to clean environment.";
 	elif ! rtl_check_path_vars "${DEFAULT_CHECK_PATH_VARS}"; then
 		_rc=1; _status="${_status}";
 	else	export TMP="${BUILD_WORKDIR}" TMPDIR="${BUILD_WORKDIR}";
@@ -109,11 +114,11 @@ buildp_init_files() {
 		fi;
 		rtl_fileop touch "${DEFAULT_BUILD_LOG_FNAME}"; rtl_log_set_fname "${DEFAULT_BUILD_LOG_FNAME}";
 		if rtl_lmatch "${ARG_CLEAN_BUILDS}" "prefix" ","; then
-			trap "rm -f \"${DEFAULT_BUILD_STATUS_IN_PROGRESS_FNAME}\" 2>/dev/null; rtl_log_msg fatalexit \"Build aborted.\"" HUP INT TERM USR1 USR2;
-			rtl_log_msg info "-C prefix specified, cleaning prefix...";
+			trap "rm -f \"${DEFAULT_BUILD_STATUS_IN_PROGRESS_FNAME}\" 2>/dev/null; rtl_log_msg \"fatalexit\" \"Build aborted.\"" HUP INT TERM USR1 USR2;
+			rtl_log_msg "info" "-C prefix specified, cleaning prefix...";
 			for _pname in ${DEFAULT_CLEAR_PREFIX_PATHS}; do
 				if ! rtl_fileop rm "${PREFIX}/${_pname}"; then
-					_rc=1; _status="Error: failed to remove \`${PREFIX}/${_pname}'."; break;
+					_rc=1; _status="failed to remove \`${PREFIX}/${_pname}'."; break;
 				fi;
 			done;
 			trap - HUP INT TERM USR1 USR2;
@@ -124,12 +129,12 @@ buildp_init_files() {
 };
 
 buildp_init_getopts() {
-	local _arg="" _level="" _opt="" _rc=0 _shiftfl=0 _verbose=0 OPTIND=0; _status="";
+	local _arg="" _opt="" _rc=0 _shiftfl=0 OPTIND=0; _status="";
 
 	: ${ARCH:="nt64"}; : ${BUILD_KIND:="debug"};
 	ARG_AS_NEEDED=0; ARG_CLEAN_BUILDS=""; ARG_DEBUG_MINIPIX=0; ARG_DIST=""; ARG_DUMP_IN="";
 	ARG_DUMP_ON_ABORT=0; ARG_FETCH_FORCE=""; ARG_PARALLEL=1; ARG_RELAXED=0; ARG_RESET_PKG=0;
-	ARG_RESTART=""; ARG_RESTART_AT=""; ARG_RESTART_RECURSIVE=""; ARG_VERBOSE_LEVELS="";
+	ARG_RESTART=""; ARG_RESTART_AT=""; ARG_RESTART_RECURSIVE=""; ARG_VERBOSE=0; ARG_VERBOSE_TAGS="";
 
 	while [ "${#}" -gt 0 ]; do
 		case "${1}" in
@@ -137,7 +142,7 @@ buildp_init_getopts() {
 		--dump-in)	if [ "${#}" -ge 2 ]; then
 					ARG_DUMP_IN="${2}"; ARG_DUMP_ON_ABORT=1; _shiftfl=2;
 				else
-					_rc=1; _status="Error: missing argument to option --dump-in.";
+					_rc=1; _status="missing argument to option --dump-in.";
 				fi; ;;
 		--dump-on-abort)
 				ARG_DUMP_ON_ABORT=1; _shiftfl=1; ;;
@@ -150,7 +155,7 @@ buildp_init_getopts() {
 			fi; exit 0; ;;
 		--reset-state)	ARG_RESET_PKG=1; _shiftfl=1; ;;
 		-v*)		_opt="${1#-}"; while [ -n "${_opt}" ]; do
-					: $((_verbose+=1)); _opt="${_opt#?}";
+					: $((ARG_VERBOSE+=1)); _opt="${_opt#?}";
 				done; _shiftfl=1; ;;
 		# {{{ --roar
 		--roar)		printf "%s\n" '
@@ -190,12 +195,12 @@ buildp_init_getopts() {
 			P)	ARG_PARALLEL="auto";
 				if [ -n "${2:-}" ]\
 				&& rtl_isnumber "${2}"; then
-					_rc=1; _status="Error: maximum parallelisation job count is set with the \`-p jobs' option."; break
+					_rc=1; _status="maximum parallelisation job count is set with the \`-p jobs' option."; break
 				fi; ;;
 			r)	ARG_RESTART="${OPTARG}"; ;;
 			R)	ARG_RELAXED=1; ;;
-			x)	ARG_VERBOSE_LEVELS="${ARG_VERBOSE_LEVELS:+${ARG_VERBOSE_LEVELS},}xtrace"; ;;
-			V)	ARG_VERBOSE_LEVELS="${OPTARG}"; ;;
+			x)	ARG_VERBOSE_TAGS="${ARG_VERBOSE_TAGS:+${ARG_VERBOSE_TAGS},}xtrace"; ;;
+			V)	ARG_VERBOSE_TAGS="${OPTARG}"; ;;
 			*)	cat etc/build.usage.short; exit 1; ;;
 			esac; shift $((${OPTIND}-1)); OPTIND=1;
 		else	if rtl_match "${1}" "=*"; then
@@ -205,8 +210,8 @@ buildp_init_getopts() {
 			fi;
 			case "${_arg}" in
 			*=*)		rtl_set_var_unsafe "${_arg%%=*}" "${_arg#*=}"; ;;
-			[!a-zA-Z]*)	_rc=1; _status="Error: build group names must start with [a-zA-Z] (in argument \`${_arg}'.)"; ;;
-			*[!_a-zA-Z]*)	_rc=1; _status="Error: build group names must not contain [!_a-zA-Z] (in argument \`${_arg}'.)"; ;;
+			[!a-zA-Z]*)	_rc=1; _status="build group names must start with [a-zA-Z] (in argument \`${_arg}'.)"; ;;
+			*[!_a-zA-Z]*)	_rc=1; _status="build group names must not contain [!_a-zA-Z] (in argument \`${_arg}'.)"; ;;
 			*)		BUILD_GROUPS="$(rtl_lconcat "${BUILD_GROUPS}" "${_arg}")"; ;;
 			esac; shift;
 		fi;
@@ -214,39 +219,56 @@ buildp_init_getopts() {
 	if [ "${_rc:-0}" -eq 0 ]; then
 		case "${ARG_PARALLEL}" in
 		auto)	if ! ARG_PARALLEL="$(rtl_get_cpu_count)"; then
-				_rc=1; _status="Error: failed to get CPU count.";
+				_rc=1; _status="failed to get CPU count.";
 			else
 				ARG_PARALLEL=$((${ARG_PARALLEL}/2));
 			fi; ;;
 		"")	ARG_PARALLEL=1; ;;
 		*)	if ! rtl_isnumber "${ARG_PARALLEL}"; then
-				_rc=1; _status="Error: invalid jobs count \`${ARG_PARALLEL}'.";
+				_rc=1; _status="invalid jobs count \`${ARG_PARALLEL}'.";
 			fi; ;;
 		esac;
 		if [ "${_rc:-0}" -eq 0 ]; then
 			DEFAULT_BUILD_CPUS="${ARG_PARALLEL}";
-			case "${_verbose:-0}" in
-			0)	;;
-			1)	ARG_VERBOSE_LEVELS="${ARG_VERBOSE_LEVELS:+${ARG_VERBOSE_LEVELS},}notice"; ;;
-			2)	ARG_VERBOSE_LEVELS="${ARG_VERBOSE_LEVELS:+${ARG_VERBOSE_LEVELS},}verbose"; ;;
-			*)	_rc=1; _status="Error: invalid verbosity level (max. -vv)"; ;;
-			esac;
-			rtl_log_set_lvl 0;
-			for _level in $(rtl_llift "${ARG_VERBOSE_LEVELS}" "," " "); do
-				case "${_level}" in
-				notice)		rtl_log_set_lvl 1; ;;
-				verbose)	rtl_log_set_lvl 2; ;;
-				build|install|xtrace)
-						rtl_log_set_lvl 1; ;;
-				fileops)	rtl_log_set_lvl 1; rtl_fileop_set_log 1; ;;
-				*)		_rc=1; _status="Error: invalid verbosity level \`${_level}'"; ;;
-				esac;
-			done;
 		fi;
 	fi;
 	return "${_rc}";
 };
 
+buildp_init_logging() {
+	local _tag="" _tags="" _rc=0; _status="";
+
+	rtl_log_clear_tags;
+	case "${ARG_VERBOSE}" in
+	0)	[ "${#ARG_VERBOSE_TAGS}" -eq 0 ] && rtl_log_enable_tags "${LOG_TAGS_normal}"; ;;
+	1)	rtl_log_enable_tags "${LOG_TAGS_verbose}"; ;;
+	*)	_rc=1; _status="invalid verbosity level (max. -v)"; ;;
+	esac;
+	if [ "${_rc}" -eq 0 ]; then
+		case "${ARG_VERBOSE_TAGS}" in
+		+*)	rtl_log_enable_tags "${LOG_TAGS_normal}";
+			ARG_VERBOSE_TAGS="${ARG_VERBOSE_TAGS#+}"; ;;
+		*)	;;
+		esac;
+		for _tag in $(rtl_llift "${ARG_VERBOSE_TAGS}" "," " "); do
+			case "${_tag}" in
+			all)		rtl_log_enable_tags "${LOG_TAGS_all}"; ;;
+			clear|none)	rtl_log_clear_tags; ;;
+			normal)		rtl_log_enable_tags "${LOG_TAGS_normal}"; ;;
+			verbose)	rtl_log_enable_tags "${LOG_TAGS_verbose}"; ;;
+			*)
+					_tags="$(rtl_lsearch_patternl "${LOG_TAGS_all}" "${_tag}" ",")";
+					if [ "${#_tags}" -gt 0 ]; then
+						rtl_log_enable_tags "${_tags}";
+					else
+						_rc=1; _status="invalid log tag or tag pattern \`${_tag}'"; break;
+					fi; ;;
+			esac;
+		done;
+	fi;
+	return "${_rc}";
+};
+
 buildp_init_prereqs() {
 	if ! rtl_check_prereqs ${DEFAULT_PREREQS}; then
 		printf "%s\n" "${_status}" >&2; exit 1;
@@ -262,6 +284,7 @@ build_init() {
 	local _rc=0; _status="";
 	if ! buildp_init_env			\
 	|| ! buildp_init_getopts "${@}"		\
+	|| ! buildp_init_logging		\
 	|| ! ex_pkg_load_vars			\
 	|| ! buildp_init_prereqs		\
 	|| ! buildp_init_args			\
@@ -270,4 +293,4 @@ build_init() {
 	fi; return "${_rc}";
 };
 
-# vim:filetype=sh
+# vim:filetype=sh foldmethod=marker
diff --git a/subr/ex_pkg.subr b/subr/ex_pkg.subr
index 90cdf3ca..f8267f54 100644
--- a/subr/ex_pkg.subr
+++ b/subr/ex_pkg.subr
@@ -21,7 +21,7 @@ ex_pkg_check_depends() {
 			if ! rtl_lmatch "${_pkg_disabled}" "${_pkg_name_depend}"\
 			&& ! rtl_lmatch "${_pkg_finished}" "${_pkg_name_depend}"; then
 				if ! rtl_lmatch "${_pkg_names}" "${_pkg_name_depend}"; then
-					rtl_log_msg fatalexit "Error: dependency \`%s' of \`%s' unknown." "${_pkg_name_depend}" "${_pkg_name}";
+					rtl_log_msg "fatalexit" "Error: dependency \`%s' of \`%s' unknown." "${_pkg_name_depend}" "${_pkg_name}";
 				else
 					_dependfl=1; break;
 				fi;
@@ -78,8 +78,8 @@ ex_pkg_get_packages() {
 ex_pkg_load_dump() {
 	local _pkg_name="${1}" _workdir="${2}" _rc=0; _status="";
 	if [ ! -e "${_workdir}/${_pkg_name}.dump" ]; then
-		rtl_log_msg warning "Warning: failed to locate environment dump for package \`%s' in \`%s'." "${_pkg_name}" "${_workdir}";
-		rtl_log_msg info "Rebuilding package \`%s' w/ --dump-in build..." "${_pkg_name}";
+		rtl_log_msg "warning" "Warning: failed to locate environment dump for package \`%s' in \`%s'." "${_pkg_name}" "${_workdir}";
+		rtl_log_msg "info" "Rebuilding package \`%s' w/ --dump-in build..." "${_pkg_name}";
 		(export	ARCH BUILD_KIND BUILD_DLCACHEDIR BUILD_WORKDIR		\
 			PREFIX PREFIX_CROSS PREFIX_MINGW32 PREFIX_MINIPIX	\
 			PREFIX_NATIVE PREFIX_ROOT PREFIX_RPM;
@@ -120,7 +120,6 @@ ex_pkg_load_vars() {
 				../midipix_build.vars		\
 				./midipix.env; do
 			if [ -r "${_fname}" ]; then
-				rtl_log_msg verbose "Sourcing \`%s'." "${_fname}";
 				rtl_fileop source "${_fname}";
 			fi;
 		done;
diff --git a/subr/ex_pkg_dispatch.subr b/subr/ex_pkg_dispatch.subr
index 255aeccc..f91f536b 100644
--- a/subr/ex_pkg_dispatch.subr
+++ b/subr/ex_pkg_dispatch.subr
@@ -230,10 +230,10 @@ ex_pkg_dispatch() {
 		_perc_group="$(rtl_percentage "${EXP_PKG_DISPATCH_GROUP_CUR}" "${EXP_PKG_DISPATCH_GROUP_MAX}")";
 		if "${_dispatch_fn}" start_group "${_group_name}" "" "${EXP_PKG_DISPATCH_GROUP_CUR}" "${EXP_PKG_DISPATCH_GROUP_MAX}" "${_perc_group}"; then
 			if rtl_fileop mkdir "${_workdir}"\
-			&& rtl_log_msg verbose "Resolving \`%s' dependencies..." "${_group_name}"\
+			&& rtl_log_msg "verbose" "Resolving \`%s' dependencies..." "${_group_name}"\
 			&& exp_pkg_dispatch_expand_packages "${_checkfl}" "${_forcefl}" "${_group_name}" "${_restart}" "${_reversefl}"\
 			&& exp_pkg_dispatch_complete "${_dispatch_fn}" "${_group_name}" "${EX_PKG_DISABLED}" "${EX_PKG_FINISHED}"\
-			&& rtl_log_msg verbose "Resolved \`%s' dependencies." "${_group_name}"\
+			&& rtl_log_msg "verbose" "Resolved \`%s' dependencies." "${_group_name}"\
 			&& EXP_PKG_DISPATCH_COUNT_MAX="$(rtl_llength "${EX_PKG_NAMES}")"\
 			&& [ "${EXP_PKG_DISPATCH_COUNT_MAX}" -gt 0 ]; then
 				_pkg_names="$(rtl_lconcat "${_pkg_names}" "${EX_PKG_NAMES}")";
diff --git a/subr/ex_pkg_env.subr b/subr/ex_pkg_env.subr
index 8f3cfcb7..5367172c 100644
--- a/subr/ex_pkg_env.subr
+++ b/subr/ex_pkg_env.subr
@@ -26,7 +26,7 @@ exp_pkg_env_defaults() {
 	if [ -z "${PKG_SUBDIR:-}" ]; then
 		if [ -n "${PKG_URLS_GIT:-}" ]\
 		&& [ -n "${PKG_FNAME:-}" ]; then
-			rtl_log_msg fatalexit "Error: \${PKG_SUBDIR} must be specified given both \${PKG_FNAME} and \${PKG_URLS_GIT}.";
+			rtl_log_msg "fatalexit" "Error: \${PKG_SUBDIR} must be specified given both \${PKG_FNAME} and \${PKG_URLS_GIT}.";
 		elif [ -n "${PKG_URLS_GIT:-}" ]; then
 			PKG_SUBDIR="${PKG_URLS_GIT%%=*}";
 		else case "${PKG_FNAME:-}" in
diff --git a/subr/pkg_fetch_download.subr b/subr/pkg_fetch_download.subr
index 8a33783f..9cd2fbe0 100644
--- a/subr/pkg_fetch_download.subr
+++ b/subr/pkg_fetch_download.subr
@@ -20,7 +20,7 @@ pkg_fetch_download_clean_dlcache() {
 		done;
 		if [ "${_skipfl}" -eq 0 ]; then
 			_fname="${_dlcachedir}/${_pkg_name}/${_fname}";
-			rtl_log_msg verbose "Deleting redundant file \`%s' for package \`%s'." "${_fname}" "${_pkg_name}";
+			rtl_log_msg "verbose" "Deleting redundant file \`%s' for package \`%s'." "${_fname}" "${_pkg_name}";
 			rtl_fileop rm "${_fname}";
 		fi;
 	done;
diff --git a/subr/pkg_install_files.subr b/subr/pkg_install_files.subr
index 3280e74d..d387293b 100644
--- a/subr/pkg_install_files.subr
+++ b/subr/pkg_install_files.subr
@@ -14,7 +14,7 @@ pkgp_install_files_v2() {
 	local _vflag=""; _status="";
 
 	if [ -n "${PKG_INSTALL_FILES_V2:-}" ]; then
-		if rtl_lmatch "${ARG_VERBOSE_LEVELS}" "install" ","; then
+		if rtl_lmatch "${ARG_VERBOSE_TAGS}" "install" ","; then
 			_vflag="-v";
 		fi;
 		if ! rtl_install_v2							\
@@ -92,7 +92,7 @@ pkgp_install_files_strip() {
 		if [ "${_stripfl:-0}" -eq 1 ]; then
 			for _bin_path in $(find "${_tree_root}" -perm /a=x -type f); do
 				if objdump -sj .debug_frame -j .debug_info "${_bin_path}" >/dev/null 2>&1; then
-					rtl_log_msg info "Stripping %s..." "${_bin_path}";
+					rtl_log_msg "pkg_strip" "Stripping %s..." "${_bin_path}";
 					if ! "${PKG_TARGET}-strip" "${_bin_path}"; then
 						return 1;
 					fi;
diff --git a/subr/pkgtool_init.subr b/subr/pkgtool_init.subr
index 1bbcbf75..d7bbd14d 100644
--- a/subr/pkgtool_init.subr
+++ b/subr/pkgtool_init.subr
@@ -10,6 +10,9 @@ pkgtoolp_init_args() {
 	&&   [ -z "${ARG_RESTART_AT}" ]\
 	&&   [ "${ARG_UPDATE_DIFF:-0}" -eq 0 ]; then
 		cat etc/pkgtool.usage; _rc=1; _status="Error: one of -i, -m and/or -M, -r, -s, or -t must be specified.";
+	elif [ "${BUILD_HNAME:+1}" != 1 ]\
+	&& ! BUILD_HNAME="$(hostname)"; then
+		_rc=1; _status="failed to obtain hostname.";
 	else	_rc=0; export TMP="${BUILD_WORKDIR}" TMPDIR="${BUILD_WORKDIR}";
 	fi; return "${_rc}";
 };
@@ -20,7 +23,12 @@ pkgtoolp_init_env() {
 		printf "Error: failed to change working directory to \`${0%/*}'." >&2; exit 1;
 	elif ! umask 022; then
 		printf "Error: failed to set umask(2).\n" >&2; exit 1;
-	else	for _fname in $(find subr.rtl -name *.subr) $(find subr -name *.subr); do
+	else	for _fname in	\
+				$(find subr.rtl -name *.subr)	\
+				$(find subr -name *.subr)	\
+				etc/pkgtool.theme		\
+				;
+		do
 			if ! . "${_fname}"; then
 				printf "Error: failed to source \`%s'.\n" "${_fname}" >&2; exit 1;
 			fi;
@@ -75,8 +83,8 @@ pkgtoolp_init_getopts() {
 			_rc=1; _status="Error: missing package name.";
 		else	export PKGTOOL_PKG_NAME;
 			case "${ARG_VERBOSE:-0}" in
-			0)	rtl_fileop_set_log 0; rtl_log_set_lvl 0; ;;
-			1)	rtl_fileop_set_log 0; rtl_log_set_lvl 2; ;;
+			0)	rtl_log_enable_tags "${LOG_TAGS_normal}"; ;;
+			1)	rtl_log_enable_tags "${LOG_TAGS_verbose}"; ;;
 			*)	_rc=1; _status="Error: invalid verbosity level (max. -v)"; ;;
 			esac;
 		fi;