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-rw-r--r--etc/README.md9
1 files changed, 8 insertions, 1 deletions
diff --git a/etc/README.md b/etc/README.md
index 98f1d35b..38206285 100644
--- a/etc/README.md
+++ b/etc/README.md
@@ -342,7 +342,14 @@ build groups without taking ownership thereof, if ``owner`` is specified, the de
group owns all of its packages. If ``noauto`` is specified, the build group will not be added to
the list of build groups to build by default, if ``auto`` is specified, the build group will be
added to the list of build groups to build by default.
-
+
+If a build group that specifies ``copy`` should copy all of its build group variables from another
+build group, use the following code:
+
+```shell
+ex_pkg_copy_group_vars "<source group name>" "<destination group name>";
+```
+
Additionally, single package files may be added beneath ``groups.d/[0-9][0-9][0-9].<group name>.d/``,
named ``<package name>.package`` containing the package's variables, with the following epilogue,
the parameters enclosed in square brackets being optional: