john john # emerge compiz-fusion desktop-acceleration-helpers
Calculating dependencies /
!!! All ebuilds that could satisfy "~x11-libs/ccs-lib-9999" have been masked.
!!! One of the following masked packages is required to complete your request:
- x11-libs/ccs-lib-9999 (masked by: missing keyword)

For more information, see MASKED PACKAGES section in the emerge man page or 
refer to the Gentoo Handbook.
(dependency required by "dev-python/ccs-python-9999" [ebuild])