All qemu ebuilds in tree have: RDEPEND="!static? ( ${LIB_DEPEND//\[static-libs(+)]} ) !app-emulation/kqemu !app-emulation/qemu !<app-emulation/qemu-1.0 >=sys-firmware/seabios-1.7.0 sys-firmware/sgabios sys-firmware/vgabios While my installed vgabios-0.6c has: RDEPEND="!app-emulation/qemu !<=app-emulation/qemu-kvm-1.0" This of course creates a very strange block condition when I try to emerge a new qemu. If qemu correctly had >=sys-firmware/vgabios-0.6c-r1 (where vgabios no longer has the above block on qemu) then portage would have resolved this on it's own. Or maybe you'll say that it's a portage bug?
There is no -r1 version of vgabios-0.6c. Portage will upgrade you so the problem should resolve itself. Use emerge -auDNv world