I personally seriously doubt this is going to work, since this would mean that the "apache" user tries to chown something that's currently owned by the "root" user.
I don't think Linux will be willing to accept this, unless I misunderstand where this is being called?

This would probably need to happen as part of the actual runroot, but that will most likely not actually have the uid of the user running the compose.

Good point. I tried it locally and it seemed to work, but trying again it does not. Not sure what I did wrong.