Now opening the "formal bug", after we've discussed this a few times... Please add portage support in EAPI=5 profile directories for the files use.stable.mask, use.stable.force, package.use.stable.mask, package.use.stable.force http://archives.gentoo.org/gentoo-dev/msg_6c492ae43ad7c70cef6aa8ac34911adf.xml http://git.overlays.gentoo.org/gitweb/?p=proj/pms.git;a=commitdiff;h=2921080e5b4f67ae55d2f80f8fea2b8d47ced831
This is implemented now: http://git.overlays.gentoo.org/gitweb/?p=proj/portage.git;a=commit;h=ebf5d1a64a4a40a0efeba3b038122eef375ace94
This is fixed in 2.1.11.12 and 2.2.0_alpha123.
Looks like we don't have a separate PMS bug for this feature, so CCing pms-bugs to this one.
PMS commit: http://git.overlays.gentoo.org/gitweb/?p=proj/pms.git;a=commit;h=3023cd7a32124e6fa5c11d0d1440fd78f73e8f94