The patches just change the binary location from /usr/local/sbin to /usr/bin (Arch does not have sbin), and the configuration file from /usr/local/etc to /etc/virtctl.
I use Arch myself (and there is a PKGBUILD now), so why not change paths to standard locations.
taken from https://github.com/dehesselle/virtctl/issues/3#issuecomment-457373579:
I use Arch myself (and there is a PKGBUILD now), so why not change paths to standard locations.