It seems samba >=4.3 is masked two times: # Lars Wendler <polynomial-c@gentoo.org> (06 Sep 2016) # Breaks samba's nmbd process (bug #592502) # Masked the possible fixed samba version until more testing has been performed. >=sys-libs/tevent-0.9.30 >=net-fs/samba-4.5.0-r1 # Lars Wendler <polynomial-c@gentoo.org> (09 Sep 2015) # Masked for testing >=net-fs/samba-4.3.0 I don't know if you plan to use samba < 4.3 ever, if that is not the case and we (stable users) are expected to jump directly from 4.2 to the latest, maybe the masked ebuilds could be reduced and mask entry updated to only mask the really "broken" version :/ Thanks!