On core updates, many perl packages fail with the error "Can't locate Module/Build.pm in @INC". I guess this is related to the fact that we updated perl from 5.16.1 to 5.22.1, or perhaps due to the patches we've applied to improve build determinism. Can someone familiar with perl take a look?
http://hydra.gnu.org/build/937074 http://hydra.gnu.org/build/935112 http://hydra.gnu.org/build/942189 http://hydra.gnu.org/build/943965 http://hydra.gnu.org/build/936233 http://hydra.gnu.org/build/935567 http://hydra.gnu.org/build/937251 http://hydra.gnu.org/build/934465 http://hydra.gnu.org/build/944530 http://hydra.gnu.org/build/934665 http://hydra.gnu.org/build/935684 http://hydra.gnu.org/build/936910 http://hydra.gnu.org/build/934592 Mark
