When running in a mkosi namespaced env tmpfiles fails to set ACLs:
Running create action for entry a /buildroot/var/log/journal
Setting access ACL u::rwx,g::r-x,g:adm:r-x,m::r-x,o::r-x on /buildroot/var/log/journal
Setting access ACL "u::rwx,g::r-x,g:adm:r-x,m::r-x,o::r-x" on /buildroot/var/log/journal failed: Invalid argument
If EINVAL is returned and we are in a chroot, skip gracefully via
EOPNOTSUPP. The ACLs will be set on first boot.