merge 57204 57205 57206
thanks

See "(guix)Sending a Patch Series"  for instructions on submitting 
patches, in particular:

> When sending a patch series (e.g., using ‘git send-email’), please first
> send one message to <guix-patches@gnu.org>, and then send subsequent
> patches to <NNN@debbugs.gnu.org> to make sure they are kept together.
> See the Debbugs documentation (https://debbugs.gnu.org/Advanced.html)
> for more information.  You can install ‘git send-email’ with ‘guix
> install git:send-email’.
Greetings,
Maxime.