net-misc/cfengine-3.0.5_p1-r1 depends on app-emulation/libvirt by the libvirt useflag. Please either keyword it or mask the libvirt useflag.
~sparc done
~arm keyword restored.
I'll re-add the ppc keyword now because I've just removed the libvirt useflag/dependency since it's blocking stabilization and so on...