Подскажите что за ошибка

Хочу поставить гном а возникает такая ошибка
!!! Multiple package instances within a single package slot have been pulled
!!! into the dependency graph, resulting in a slot conflict:

sys-fs/udev:0

(sys-fs/udev-182-r3::gentoo, ebuild scheduled for merge) pulled in by
>=sys-fs/udev-171[gudev] required by (gnome-base/gvfs-1.10.1::gentoo, ebuild scheduled for merge)
>=sys-fs/udev-171[gudev] required by (sys-power/upower-0.9.13-r1::gentoo, ebuild scheduled for merge)
>=sys-fs/udev-171[gudev] required by (sys-fs/udisks-1.0.4-r1::gentoo, ebuild scheduled for merge)
>=sys-fs/udev-171[gudev] required by (media-video/cheese-2.32.0::gentoo, ebuild scheduled for merge)
>=sys-fs/udev-171[hwdb] required by (media-sound/pulseaudio-1.1-r1::gentoo, ebuild scheduled for merge)
>=sys-fs/udev-182 required by (sys-fs/udev-init-scripts-10::gentoo, ebuild scheduled for merge)

(sys-fs/udev-171-r5::gentoo, installed) pulled in by
(no parents that aren't satisfied by other packages in this slot)