There may be ways to do it right now, but it's hard to fight the fact that Lennart doesn't want it to be supported. He's already thinking of deprecating initra

There may be ways to do it right now, but it's hard to fight the fact that Lennart doesn't want it to be supported. He's already thinking of deprecating initramfs builders that don't have systemd running inside (which causes trouble for Arch). If systemd continues to clash with initramfs tools it takes human resources away from working on things Lennart doesn't care about.