/usr/portage/net-mail/mailman/mailman-2.1.4.ebuild only contains x86 and sparc keywords, yet I manually added the ~ppc keyword to the ebuild and it installed correctly. I have been running it on a G3 for two months. Reproducible: Always Steps to Reproduce: lists root # emerge -p mailman These are the packages that I would merge, in order: Calculating dependencies !!! all ebuilds that could satisfy "mailman" have been masked. !!! possible candidates are: - net-mail/mailman-2.1.4 (masked by: missing keyword) !!! Error calculating dependencies. Please correct. I'd attach a patched ebuild, but it's only 4 characters difference. Add ~ppc to the keywords.
marked ~ppc thanks for the report