:sparkles: using lix instead of nix

hosts/desktop/default.nix

···
     options v4l2loopback devices=1 video_nr=1 card_label="OBS Cam" exclusive_caps=1
   '';
   security.polkit.enable = true;
+
+  nixpkgs.overlays = [ (final: prev: {
+    inherit (prev.lixPackageSets.stable)
+      nixpkgs-review
+      nix-eval-jobs
+      nix-fast-build
+      colmena;
+  }) ];
+
+  nix.package = pkgs.lixPackageSets.stable.lix;
 }