to non-verbose boot options. This will avoid automatic plymouth switch
to "details" view - retaining nice graphical progress. And also will be
copied to the target system, with the same effect - nice graphical boot.
QubesOS/qubes-issues#3849
Anaconda/pungi doesn't support multiple versions of the same package at
the time, so place all kernels on installation media in separate
directory and install them in %post script.
