In the absence of a functional environment this is assumed to work when one of us will create a service which populates /var/ etc accordingly OR if the bash scripts for list creation just work. I would test it myself, but right now I can only testify that the build works. Setting it up on a server will be delayed until I have taken the time to assemble a GuixSD server with a static IP.
Read the README file to see why and where the default locations are.
