etc/build.usage{,.short}: updated.

etc/README.md: updated.

1 files changed, 3 insertions, 2 deletions

diff --git a/etc/build.usage b/etc/build.usage
index ed3c7df6..0f8dfddb 100644
--- a/etc/build.usage
+++ b/etc/build.usage
@@ -4,7 +4,8 @@
                   [-v] [-V [+]tag|pat[,..]]
 
                   [--as-needed] [--debug-minipix]  [--reset-state] [--roar]
-                  [--theme theme] [[=]<group>|<variable name>=<variable override>[ ..]]
+                  [--theme theme]
+                  [[=]<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.
@@ -86,7 +87,7 @@
         --reset-state       Reset package build step state on exit.
         --theme theme       Set theme.
 
-        <group>[ ..]        One of: dev_packages, dist, host_deps, host_deps_rpm,
+        <group>[,..][ ..]   One of: dev_packages, dist, host_deps, host_deps_rpm,
                             host_toolchain, host_tools, minipix, native_packages,
                             native_runtime, native_toolchain, native_tools.