Also, this doesn't work:

On Sun, 25 Sep 2022 16:06:06 +0200
Danny Milosavljevic <dannym@scratchpost.org> wrote:

(1) install the guix system
(2) log in as regular user
(3c) git clone --depth=1 https://git.savannah.gnu.org/git/guix.git guix \
   && cd guix \
   && guix shell

Even after doing

echo /home/dannym/....../guix >> /home/dannym/.config/guix/shell-authorized-directories

I get:

guix shell: loading environment from '/home/dannym/backup/g1/guix/guix.scm'...
Backtrace:
          14 (primitive-load "/home/dannym/.config/guix/current/bin/?")
In guix/ui.scm:
   2263:7 13 (run-guix . _)
  2226:10 12 (run-guix-command _ . _)
In ice-9/boot-9.scm:
  1752:10 11 (with-exception-handler _ _ #:unwind? _ # _)
  1752:10 10 (with-exception-handler _ _ #:unwind? _ # _)
In guix/store.scm:
   656:37  9 (thunk)
   1295:8  8 (call-with-build-handler #<procedure 7fd26be46e40 at g?> ?)
In guix/status.scm:
    815:4  7 (call-with-status-report _ _)
In guix/scripts/environment.scm:
    320:4  6 (_)
In srfi/srfi-1.scm:
   673:15  5 (append-map _ _ . _)
   586:29  4 (map1 _)
   586:17  3 (map1 ((load package "/home/dannym/backup/g1/guix/?") ?))
In guix/scripts/environment.scm:
    306:4  2 (packages->outputs _ _)
In ice-9/boot-9.scm:
  1685:16  1 (raise-exception _ #:continuable? _)
  1685:16  0 (raise-exception _ #:continuable? _)

ice-9/boot-9.scm:1685:16: In procedure raise-exception:
Throw to key `match-error' with args `("match" "no matching pattern" #<unspecified>)'.