Not sure if this comment is worth posting at berrybrew's homepage, therefore, here. To match sudo-less-ness of Perlbrew, maybe it's better to modify not "system", but "user" PATH environment variable. It was slightly discomforting :) to run berrybrew with elevated privileges. We are all admins at our Windows, but still... Also, a minor inconvenience (a bit untidy) was to find a .cpanm folder in the root of my C drive. The portable Strawberry Perl defines HOME environment variable to hide it.
OTOH, if the purpose of berrybrew was to install/manage Perls at system level regardless of logged-in user, then please ignore this comment :)