I LOVE guix and especially its inclusive community! I think, I have seen a lot of free software communities over the years, but these guys are the best!

I made a channel for guix (with a lot of chess stuff):
to checkout/clone it:

git clone https://www.rohleder.de/git/guix.git

to add it as a guix channel, add this to ~/.config/guix/channels.scm

(cons (channel
  (name 'mroh)
  (url "https://www.rohleder.de/git/guix.git")
     "755E 2DE5 D0D5 85C5 2E78  2830 7C7A FFBE FEF2 CB25"))))