There is a create_makefile_pl option (see Module::Build::Compat) which does a fair job of creating a Makefile.PL functionally equivalent to your Build.PL. It comes in various flavors from passthrough (where it writes a Makefile which simply calls Module::Build functions) to a pure MakeMaker implementation.
That's another gripe of mine about M::B and create_makefile_pl.
It puts the requires AND build_requires in the PREREQ_PM in the Makefile.PL, which I won't want; nor do I think it right for everyone.
Take Test::More for example. It's usually a build_requires and the other Test* things like Test::Strict, Apache::Test, etc are in recommends. Test probably won't run with Test::More, but skipping a few subtests based on recommends is ok. But I don't think build_requires should be a PREREQ_PM requirement at all.
For that matter, it's not really clear what the expected outcome of a missing build_requires requirement is as far as CPAN/CPANPLUS is concerned.
Flipping through the Makefile.PLs of your modules they look for the most part trivial and would be handled fine by create_makefile_pl.
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