How can I use the Guix version of my Git clone, alongside its packages,
services, etc. while still using extra channels?
Sample run: a build of my current system works:
$ guix system build /etc/guix/configuration.scm
/gnu/store/gfn6hpim1njlnr0d3p6mmvc4zgqmgqw6-system
But when trying to use the code from my clone, it fails to recognize the
extra channels, available in the system-wide /etc/guix/channels.scm file:
$ ./pre-inst-env guix system build /etc/guix/configuration.scm
guix system: error: failed to load '/etc/guix/configuration.scm':
ice-9/boot-9.scm:3330:6: In procedure resolve-interface:
no code for module (xyz euandreh queue)
