-The Config.mak should not be saved to the repositories usually, but in this
-case it is because part of this demonstration is to show how to customize the
-build system through Config.mak, and specially to show how a project can be
-"embedded" into another tweaking the Config.mak.
+The Config.local.mak should not be saved to the repositories usually, it's
+supposed to be user configuration not visible to other users, but in
+this case it is because is part of this demonstration. Also, subproj's
+Config.local.mak shows how to make another project using Makeit behave as it was
+part of this project, as an "embedded" sub-project.
+
+This means you could copy subproj directory elsewhere, remove Config.local.mak
+and that should be a standalone project using Makeit. Tweaking ours
+Config.local.mak here, we integrate it into the build system, so doing make in
+our parent project will make subproj too.