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"]