‘guix shell -CW’ dismisses extra channels available in the original Guix, as illustrated by this example:
--8<---------------cut here---------------start------------->8--- $ guix time-machine -C <(echo '(cons (channel (name (quote guix-hpc)) (url "https://gitlab.inria.fr/guix-hpc/guix-hpc.git";)) %default-channels)') -- shell -CW coreutils -- guix describe guix cbd20d6 repository URL: https://git.savannah.gnu.org/git/guix.git branch: master commit: cbd20d627497053871db863970c07d93c7081786 $ guix time-machine -C <(echo '(cons (channel (name (quote guix-hpc)) (url "https://gitlab.inria.fr/guix-hpc/guix-hpc.git";)) %default-channels)') -- describe guix cbd20d6 repository URL: https://git.savannah.gnu.org/git/guix.git branch: master commit: cbd20d627497053871db863970c07d93c7081786 guix-hpc 887d76a repository URL: https://gitlab.inria.fr/guix-hpc/guix-hpc.git branch: master commit: 887d76a8e1d0f35d615c613b28b9b871f39a997e --8<---------------cut here---------------end--------------->8--- This is due to the fact that ‘-W’ (‘--nesting’) is implemented by adding the outer ‘guix’ to the container’s profile, without also adding its companion profile entries (those that provide channels). Ludo’.
