Не понял вот такое обновление
emerge -uDNa world
Performing Global Updates
(Could take a couple of minutes if you have a lot of binary packages.)
.='update pass' *='binary update' #='/var/db update' @='/var/db move'
s='/var/db SLOT move' %='binary move' S='binary SLOT move'
p='update /etc/portage/package.*'
/usr/portage/profiles/updates/1Q-2016.........
These are the packages that would be merged, in order:
Calculating dependencies... done!
[binary UD ] www-client/firefox-38.6.0 [43.0]
!!! The following binary packages have been ignored due to changed dependencies:
kde-plasma/breeze-5.5.4::gentoo
net-dns/bind-tools-9.10.3_p2::gentoo
NOTE: The --binpkg-changed-deps=n option will prevent emerge
from ignoring these binary packages if possible.
Using --binpkg-changed-deps=y will silence this warning.
Would you like to merge these packages? [Yes/No]
Печально если это вынужденный downgrade.