Add the -rational-rock option to xorriso.
This is a preparatory step for creating ISOs as a regular user. See https://gitlab.archlinux.org/archlinux/archiso/-/issues/40 .
https://github.com/archlinux/archiso/commit/
6312ccc9bccb453c8506322581aa467538bc123f
xorriso -as mkisofs ${_qflag} \
-iso-level 3 \
-full-iso9660-filenames \
+ -rational-rock \
-volid "${iso_label}" \
-appid "${iso_application}" \
-publisher "${iso_publisher}" \