You can override the other unit without rewriting. Place you config here. > /etc/systemd/system/<unit>.service.d I've used PartOf to enforce "dependency". Lot

You can override the other unit without rewriting. Place you config here. > /etc/systemd/system/<unit>.service.d I've used PartOf to enforce "dependency". Lots of other ways to enforce order and dependency once you have the override in place.