I don't know much about systemd, so I can't be of much help with this. If anyone wants to take responsibility for a solution, please go ahead. (Also consider addressing #771393 at the same time.)
An alternative would be to remove systemd support from the package for the release and rely on the plain old sysvinit setup. -- To UNSUBSCRIBE, email to debian-bugs-dist-requ...@lists.debian.org with a subject of "unsubscribe". Trouble? Contact listmas...@lists.debian.org