Installed systems carry 1:1.0.0.r361.cf8cd9d-1 from an earlier build
that had epoch=1. Current PKGBUILD ships 1.0.0.r376.de27e95-1 without
epoch, which pacman vercmp ranks BELOW the installed version, so
ohm refuses to upgrade with:
warning: libva-v4l2-request-fourier: local (1:1.0.0.r361.cf8cd9d-1) is
newer than marfrit (1.0.0.r376.de27e95-1)
Restoring epoch=1 fixes the monotonic version chain.