@monkey1 They are in Guix Proper, you may need to do a guix pull to be able to get them.
https://git.savannah.gnu.org/cgit/guix.git/commit/?id=ec4c0fad32620ffab7a8600927f55b5885518b3c
https://git.savannah.gnu.org/cgit/guix.git/commit/?id=5bbed5748f12cbeded90a270332cd126dfcac819
@abcdw
Thanks! I thought I had done a pull already. I will keep you posted. I assume it is similar to Cider in terms of how it works.