tobhe: what is the mesa update process?
my build updated files by copying https://gitlab.freedesktop.org/asahi/mesa directly into a package
the about of https://github.com/UbuntuAsahi/mesa states it is forked from https://github.com/Mesa3D/mesa (aka https://gitlab.freedesktop.org/mesa/mesa/ )
there are additional commits from asahi/mesa in UbuntuAsahi/mesa though