If you're a developer, Makefile.PL will pack `cmddirs` from build/cmddirs.PL and then copy that file to `bin/cmddirs`.
You can pretend to be an author by running it with:
perl Makefile.PL --author
You should install App::FatPacker before doing so.
Do not commit the changes to the `cmddirs` standalone executable. We only commit changes to this file whenever we tag a new CPAN release.