Andy Wingo <wingo@pobox.com> skribis:

> -             (shell #~(string-append #$shadow "/sbin/nologin"))))
> +             (shell "/run/current-system/profile/sbin/nologin")))

[...]

> -                            (shell #~(string-append #$shadow
> -                                                    "/sbin/nologin")))))))))
> +                            (shell "/run/current-system/profile/sbin/nologin"))))))))

[...]

> +  (shell          user-account-shell              ; string
> +                  (default "/run/current-system/profile/bin/bash"))

The problem I see with this approach is that it will only work if the
shell is actually install in the global profile, and it’s really a
workaround: users could still use a gexp as for the ‘shell’ field.

I think we should instead generate /etc/shells based on the ‘shell’
field of each user account, so that it matches exactly what’s being
used: