GUIX_EXTENSIONS_PATH error?

[zimoun]

Hi,

In the mood for documenting the recent GUIX_EXTENSIONS_PATH, I am
missing something because I hit an error.  Before diving, maybe my
daily coffee dose is not enough…


--8<---------------cut here---------------start------------->8---
$ cat /tmp/foo/bar.scm
(define-module (guix extensions bar)
  #:use-module (guix scripts))


(define-command (guix-bar . args)
  (category extension)
  (synopsis "a bar with beers")

  (pk "dumb"))


$ export GUIX_EXTENSIONS_PATH=/tmp/foo

$ guix --help
Usage: guix COMMAND ARGS...
Run COMMAND with ARGS.

COMMAND must be one of the sub-commands listed below:
Backtrace:
           4 (primitive-load "/home/simon/.config/guix/current/bin/guix")
In ice-9/boot-9.scm:
  1731:15  3 (with-exception-handler #<procedure 7f13f2064b70 at 
ice-9/boot-9.scm:1815:7 (exn)> _ # _ …)
In guix/ui.scm:
  2105:20  2 (show-guix-help)
In srfi/srfi-1.scm:
   691:23  1 (filter-map #<procedure source-file-command (file)> _ . _)
In guix/ui.scm:
   2023:2  0 (source-file-command _)

guix/ui.scm:2023:2: In procedure source-file-command:
Throw to key `match-error' with args `("match" "no matching pattern" ("tmp" 
"foo" "bar.scm"))'.
--8<---------------cut here---------------end--------------->8---

What do I miss?


All the best,
simon