It would be great if MBS using the mock builder could add the module packages it already built back to the buildroot. This is needed to satisfy build dependencies between packages within a module.

An example/reproducer:

A build of the testmodule [1] fails, because the tangerine package build-requires the other two packages, perl-List-Compare and perl-Tangerine.

Why is this needed?

So I (a member of the Modularity team) can test the modules I write.

Links:

[1] http://pkgs.stg.fedoraproject.org/cgit/modules/testmodule.git/tree/testmodule.yaml