bug#54209: ‘guix shell -D … --with-branch …’ leads to an invalid derivation

[Ludovic Courtès]

Hello,

The following command ends up creating an invalid derivation in the
glib-schemas hook:

--8<---------------cut here---------------start------------->8---
$ guix shell -D guile-next  --with-branch=guile-next=stable-2.2 
python-matplotlib  
guix shell: error: derivation 
`/gnu/store/6hy95hpjbbzvppwxndzapi3f5s1xcgkm-glib-schemas.drv' has incorrect 
output `/gnu/store/vahx614bazd4zk5akkqp1y7aflbi1rla-glib-schemas', should be 
`/gnu/store/m0138ijax94m5lcdksw8jz5zdvlhdghh-glib-schemas'
$ guix describe
Generacio 205   Feb 27 2022 17:52:04    (nuna)
  guix 85a5110
    repository URL: https://git.savannah.gnu.org/git/guix.git
    branch: master
    commit: 85a5110de79f4fe9fd822ede3915654ee699d6c5
--8<---------------cut here---------------end--------------->8---

The problem vanishes if we pass ‘--no-grafts’ or if we remove
‘--with-branch’.

Ludo’.