bug#55521: ‘guix shell --export-manifest’ can yield incorrect results

[Ludovic Courtès]

‘guix shell --export-manifest’ behaves in a strange way:

--8<---------------cut here---------------start------------->8---
$ guix shell rubber --export-manifest
;; What follows is a "manifest" equivalent to the command line you gave.
;; You can store it in a file that you may then pass to any 'guix' command
;; that accepts a '--manifest' (or '-m') option.

(specifications->manifest (list "rubber"))
$ guix shell texlive-base --export-manifest
;; What follows is a "manifest" equivalent to the command line you gave.
;; You can store it in a file that you may then pass to any 'guix' command
;; that accepts a '--manifest' (or '-m') option.

(specifications->manifest (list "texlive-base"))
$ guix shell texlive-base rubber --export-manifest
;; What follows is a "manifest" equivalent to the command line you gave.
;; You can store it in a file that you may then pass to any 'guix' command
;; that accepts a '--manifest' (or '-m') option.
(concatenate-manifests)
$ guix describe
Generation 214  May 02 2022 21:44:14    (current)
  guix 6b588da
    repository URL: https://git.savannah.gnu.org/git/guix.git
    branch: master
    commit: 6b588da368c77cde82ea2f22ca315116228777ad
--8<---------------cut here---------------end--------------->8---

Something breaks when combining ‘rubber’ with other packages.

Ludo’.