No, I'm probably not being clear enough. What I'm suggesting they do is supply a legacy Makefile.PL that works totally independant of having M::B installed at all.
No, I'm probably not being clear enough :-)
The the "traditional" create_makefile_pl option in M::B produces a normal Makefile.PL file at distribution time that uses EU::MM. So the package you download from CPAN has a Makefile.PL that you can use without having M::B installed - and a Build.PL if you do have M::B installed.
Hopefully this makes some vague sort of sense :-)