Calculating dependencies... done!

emerge: there are no ebuilds built with USE flags to satisfy ">=sys-auth/consolekit-0.4[policykit]".
!!! One of the following packages is required to complete your request:
- sys-auth/consolekit-0.4.1 (Change USE: +policykit)
(dependency required by "sys-auth/polkit-0.96-r1" [installed])
(dependency required by "sys-fs/udisks-1.0.1-r1" [installed])
(dependency required by "sys-apps/gnome-disk-utility-2.30.1" [installed])
(dependency required by "gnome-base/gvfs-1.6.3" [installed])
(dependency required by "gnome-base/libgnome-2.30.0" [installed])
(dependency required by "www-client/firefox-3.6.9" [installed])
(dependency required by "@world" [argument])