It has been a while since I used ActivePerl, but I recall last year they made the mistake of modifying ExtUtils::MakeMaker/Config to run ActivePerl::DocTools and override some config values. Its not the first time. Bug #45432 for ExtUtils-MakeMaker: EU::Liblist::Kid breaks ActivePerl + MinGW + PAR-Packer

I would try searching for bug reports on http://bugs.activestate.com/

In reply to Re^3: How to change compiler options used by cpan ? by Anonymous Monk
in thread How to change compiler options used by cpan ? by flamey

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