Net-Twitter in tree uses Module::Build via Build.PL, and as such, should depend on virtual/perl-Module-Build to deal with the reality that Module::Build will be dropped from core sometime at or after perl 5.20 I have PERLQAFATAL=1 in my bashrc, so it bails for me pre-emptively, in perl-module.eclass : einfo "Using Module::Build" if [[ ${DEPEND} != *virtual/perl-Module-Build* && ${PN} != Module-Build ]] ; then eqawarn "QA Notice: The ebuild uses Module::Build but doesn't depend on it." eqawarn " Add virtual/perl-Module-Build to DEPEND!" if [[ -n ${PERLQAFATAL} ]]; then eerror "Bailing out due to PERLQAFATAL=1"; die; fi fi
fixed, thanks.