bug#47164: Cuirass specification complains about missing guix channel when a non-guix channel gets a new commit alone

[Mathieu Othacehe]

Also note that you can now use this specification:

--8<---------------cut here---------------start------------->8---
(list
 (specification
  (namee "my-pkgs")
  (build '(channels my-guix-packages))
  (channels
   (list %default-guix-channel
         (channel
          (name 'my-guix-packages)
          (url "https://github.com/methuselah-0/my-guix-packages.git";))))))
--8<---------------cut here---------------end--------------->8---

to have Cuirass build all the packages in your personal channel and rely
on the build farm at https://ci.guix.gnu.org to build all the other
packages.

Thanks,

Mathieu