There are packages in portage which depend on ~x11-wm/compiz-0.7.8, like e.g. x11-wm/compiz-fusion-0.7.8, but x11-wm/compiz-0.7.8 itself isn't in portage. I guess someone simply missed it, and the ebuild is already out there on the system of some developer. Can you please add it to portage?
Looks like it: cvs/gentoo-x86/x11-wm/compiz-fusion $ repofull RepoMan scours the neighborhood... RDEPEND.badindev 6 x11-wm/compiz-fusion/compiz-fusion-0.7.8.ebuild: ~amd64(default-linux/amd64/2007.0/no-multilib) ['~x11-wm/compiz-0.7.8'] x11-wm/compiz-fusion/compiz-fusion-0.7.8.ebuild: ~amd64(selinux/2007.0/amd64) ['~x11-wm/compiz-0.7.8'] x11-wm/compiz-fusion/compiz-fusion-0.7.8.ebuild: ~amd64(selinux/2007.0/amd64/hardened) ['~x11-wm/compiz-0.7.8'] x11-wm/compiz-fusion/compiz-fusion-0.7.8.ebuild: ~amd64(default/linux/amd64/2008.0/no-multilib) ['~x11-wm/compiz-0.7.8'] x11-wm/compiz-fusion/compiz-fusion-0.7.8.ebuild: ~x86(selinux/2007.0/x86) ['~x11-wm/compiz-0.7.8'] x11-wm/compiz-fusion/compiz-fusion-0.7.8.ebuild: ~x86(selinux/2007.0/x86/hardened) ['~x11-wm/compiz-0.7.8'] RDEPEND.bad 20 x11-wm/compiz-fusion/compiz-fusion-0.7.8.ebuild: ~amd64(default-linux/amd64/2007.0) ['~x11-wm/compiz-0.7.8'] x11-wm/compiz-fusion/compiz-fusion-0.7.8.ebuild: ~amd64(default-linux/amd64/2007.0/desktop) ['~x11-wm/compiz-0.7.8'] x11-wm/compiz-fusion/compiz-fusion-0.7.8.ebuild: ~amd64(default-linux/amd64/2007.0/server) ['~x11-wm/compiz-0.7.8'] x11-wm/compiz-fusion/compiz-fusion-0.7.8.ebuild: ~amd64(hardened/amd64) ['~x11-wm/compiz-0.7.8'] x11-wm/compiz-fusion/compiz-fusion-0.7.8.ebuild: ~amd64(hardened/amd64/multilib) ['~x11-wm/compiz-0.7.8'] x11-wm/compiz-fusion/compiz-fusion-0.7.8.ebuild: ~amd64(default/linux/amd64/2008.0) ['~x11-wm/compiz-0.7.8'] x11-wm/compiz-fusion/compiz-fusion-0.7.8.ebuild: ~amd64(default/linux/amd64/2008.0/desktop) ['~x11-wm/compiz-0.7.8'] x11-wm/compiz-fusion/compiz-fusion-0.7.8.ebuild: ~amd64(default/linux/amd64/2008.0/developer) ['~x11-wm/compiz-0.7.8'] x11-wm/compiz-fusion/compiz-fusion-0.7.8.ebuild: ~amd64(default/linux/amd64/2008.0/server) ['~x11-wm/compiz-0.7.8'] x11-wm/compiz-fusion/compiz-fusion-0.7.8.ebuild: ~amd64(hardened/linux/amd64) ['~x11-wm/compiz-0.7.8'] x11-wm/compiz-fusion/compiz-fusion-0.7.8.ebuild: ~x86(default-linux/x86/2006.1) ['~x11-wm/compiz-0.7.8'] x11-wm/compiz-fusion/compiz-fusion-0.7.8.ebuild: ~x86(default-linux/x86/2006.1/desktop) ['~x11-wm/compiz-0.7.8'] x11-wm/compiz-fusion/compiz-fusion-0.7.8.ebuild: ~x86(default-linux/x86/2007.0) ['~x11-wm/compiz-0.7.8'] x11-wm/compiz-fusion/compiz-fusion-0.7.8.ebuild: ~x86(default-linux/x86/2007.0/desktop) ['~x11-wm/compiz-0.7.8'] x11-wm/compiz-fusion/compiz-fusion-0.7.8.ebuild: ~x86(hardened/x86/2.6) ['~x11-wm/compiz-0.7.8'] x11-wm/compiz-fusion/compiz-fusion-0.7.8.ebuild: ~x86(default/linux/x86/2008.0) ['~x11-wm/compiz-0.7.8'] x11-wm/compiz-fusion/compiz-fusion-0.7.8.ebuild: ~x86(default/linux/x86/2008.0/desktop) ['~x11-wm/compiz-0.7.8'] x11-wm/compiz-fusion/compiz-fusion-0.7.8.ebuild: ~x86(default/linux/x86/2008.0/developer) ['~x11-wm/compiz-0.7.8'] x11-wm/compiz-fusion/compiz-fusion-0.7.8.ebuild: ~x86(default/linux/x86/2008.0/server) ['~x11-wm/compiz-0.7.8'] x11-wm/compiz-fusion/compiz-fusion-0.7.8.ebuild: ~x86(hardened/linux/x86) ['~x11-wm/compiz-0.7.8'] ebuild.allmasked 1 x11-wm/compiz-fusion KEYWORDS.dropped 1 x11-wm/compiz-fusion/compiz-fusion-0.7.8.ebuild: ppc Please fix these important QA issues first. RepoMan sez: "Make your QA payment on time and you'll never see the likes of me."
This was my fault. It seems the commit script failed to commit compiz and I didn't notice. My apologies. I've commited it now.