Comment # 11 on bug 4393 from Tomasz Torcz

> ZoneMinder uses tmpfiles.d to create the runtime folder. It should have happened
> automatically during package installation. Perhaps the command to force
> tmpfiles.d to update immediately w/o reboot went missing from %post. I can look.

This looks like a job for RuntimeDirectory= in unit file. Can you talk with
upstream to include it in unit file and drop the tmpfiles line?