What if a missing module was installed in the meantime?

A module "FakeInc" called via something like perl -MFakeInc -c could check if the module is available before installing a facade.

~~~

Thinking about it, having a code hook at the last position of @INC could also handle all missing modules...

from require : You can also insert hooks into the import facility by putting Perl code directly into the @INC array. There are three forms of hooks: subroutine references, array references, and blessed objects.

update

oops ... I didn't realized there was already a demo: Re: Perl syntax checking without `perl -c`