Hello,
I just built RuneAudio+Re3 via the DIY method. Everything went fine with running create-alarm.sh on my desktop. But after inserting the SD card into my Pi3 I saw a lot of messages in the journal that some daemons (e.g. timedate) could not be started.
It turned out that the service responsible for creating the temporary file directories could not start because of unsafe path transitions.
I checked the permission on / and it had 700 owned by the alarm user and not root. I don't know where that came from but setting the correct permissions (755) and ownership (root) fixed the problem. Also, I tried it two times with the same result. So, that might be a permanent problem.
Just to let you know if you run into similar problems.
Cheers