Hi,

> Yeah, someone needs to create /tmp.  That someone is not Guix (it would be weird).

There is a workaround in /with-guix-daemon.scm in that guix-on-docker container,
which is how I'm using it.

The entrypoint I'm using (with the unmodified guix-on-docker image) is

   ["guix", "repl", "--", "/with-guix-daemon.scm"]