/
It's not supported to pass anything other than `/` now, and the argument has been optional for some time. See: 09750a1f7a
09750a1f7a
This does what we should have done originally, and copies the bootupd bits directly from https://github.com/coreos/fedora-coreos-config/blob/testing-devel/manifests/bootupd.yaml And uses them via includes.