During the Funtoo Friday Nights live stream, a community request came in from court-jester to fix app-emulation/virt-manager emerge errors on Funtoo 1.4 and upgrade it to the latest upstream version, as of this date version 4.0.0.
This issue is tracking autogenning the app-emulation/virt-manager to the latest Funtoo metatools packaging standards.
Some useful links: