To test it, you need to run the daemon from your checkout, with
something like:

  sudo herd stop guix-daemon
  sudo -E ./pre-inst-env guix-daemon --build-users-group=guixbuild &

(Once we’ve applied the fix, we’ll have to update the ‘guix’ package.)

I think we should eventually our ‘git’ package as discussed in
<https://issues.guix.gnu.org/65924>, but that won’t help on foreign
distros anyway, hence the fix above.

WDYT?

Ludo’.