--8<---------------cut here---------------start------------->8---
> guix describe --format=json
[{"name":"guix","url":"https://git.savannah.gnu.org/git/guix.git","commit":"77f3d3036406b1d1ceaeba8017ae5f597f2a0fb4"}]
Backtrace:
           4 (primitive-load "/home/ambrevar/.config/guix/current/bin/guix")
In guix/ui.scm:
  1654:12  3 (run-guix-command _ . _)
In ice-9/boot-9.scm:
    829:9  2 (catch srfi-34 #<procedure 2ff58a0 at guix/ui.scm:624:2 ()> #<procedure 7f711b6c39b8 at guix/ui.scm:624:2 (key c)> _)
    829:9  1 (catch system-error #<procedure 2ff5940 at guix/scripts/describe.scm:203:4 ()> #<procedure 7f711b6c39d0 at guix/ui.scm:750:6 (key proc format-string format-args . rest)> _)
In guix/scripts/describe.scm:
     83:5  0 (display-package-search-path json)

guix/scripts/describe.scm:83:5: In procedure display-package-search-path:
Throw to key `match-error' with args `("match" "no matching pattern" json)'.
--8<---------------cut here---------------end--------------->8---

--8<---------------cut here---------------start------------->8---
> guix describe -f recutils
name: guix
url: https://git.savannah.gnu.org/git/guix.git
commit: 77f3d3036406b1d1ceaeba8017ae5f597f2a0fb4

Backtrace:
           4 (primitive-load "/home/ambrevar/.config/guix/current/bin/guix")
In guix/ui.scm:
  1654:12  3 (run-guix-command _ . _)
In ice-9/boot-9.scm:
    829:9  2 (catch srfi-34 #<procedure 2ac1d20 at guix/ui.scm:624:2 ()> #<procedure 7fa6695719b8 at guix/ui.scm:624:2 (key c)> _)
    829:9  1 (catch system-error #<procedure 2ac1dc0 at guix/scripts/describe.scm:203:4 ()> #<procedure 7fa6695719d0 at guix/ui.scm:750:6 (key proc format-string format-args . rest)> _)
In guix/scripts/describe.scm:
     83:5  0 (display-package-search-path recutils)

guix/scripts/describe.scm:83:5: In procedure display-package-search-path:
Throw to key `match-error' with args `("match" "no matching pattern" recutils)'.
--8<---------------cut here---------------end--------------->8---

-- 
Pierre Neidhardt
https://ambrevar.xyz/