ocalhost kaiser # emerge compiz-fusion desktop-acceleration-helpers
Calculating dependencies... done!
>>> Verifying ebuild Manifests...
>>> starting parallel fetching

>>> Emerging (1 of 12) x11-wm/compiz-9999 to /
 * checking ebuild checksums ;-) ...                                      [ ok ]
 * checking auxfile checksums ;-) ...                                     [ ok ]
 * checking miscfile checksums ;-) ...                                    [ ok ]
 * USE="gnome" requires USE="gtk"
 * Please build with USE="gnome gtk"
 *
 * ERROR: x11-wm/compiz-9999 failed.
 * Call stack:
 *   ebuild.sh, line 1658:   Called dyn_setup
 *   ebuild.sh, line 719:   Called qa_call 'pkg_setup'
 *   ebuild.sh, line 44:   Called pkg_setup
 *   compiz-9999.ebuild, line 46:   Called die
 *
 * Build with USE="gnome gtk"
 * If you need support, post the topmost build error, and the call stack if relevant.
 * A complete build log is located at '/var/tmp/portage/x11-wm/compiz-9999/temp/build.log'.