No longer builds

[appsforartists]

I just tried to update my flake and it seems this package isn't building against the current nixpkgs-unstable:

error:
       … while calling the 'head' builtin

         at /nix/store/rv35k9fhr3cxh8qxw8lyj1y8saaxl2hq-source/lib/attrsets.nix:1575:11:

         1574|         || pred here (elemAt values 1) (head values) then
         1575|           head values
             |           ^
         1576|         else

       … while evaluating the attribute 'value'

         at /nix/store/rv35k9fhr3cxh8qxw8lyj1y8saaxl2hq-source/lib/modules.nix:821:9:

          820|     in warnDeprecation opt //
          821|       { value = addErrorContext "while evaluating the option `${showOption loc}':" value;
             |         ^
          822|         inherit (res.defsFinal') highestPrio;

       (stack trace truncated; use '--show-trace' to show the full trace)

       error: attribute 'gnome-shell' missing

       at /nix/store/sis1wr6ch2gysy2yaqk1la0ml2pi5caq-source/overlay.nix:15:19:

           14|   gnome = super.gnome.overrideScope (gself: gsuper: {
           15|     gnome-shell = gsuper.gnome-shell.overrideAttrs (old: rec {
             |                   ^
           16|       version = "46-mobile-0";  # 361fc605e595b36df68d8b691f22bccddcf84cc9
nixos-rebuild failed with exit status 1.

Here is my config: https://github.com/appsforartists/device-config