hosts: use cosmic desktop

hosts/main/default.nix

@@ -1,4 +1,9 @@
-{ inputs, pkgs, ... }:
+{
+  inputs,
+  pkgs,
+  self,
+  ...
+}:
 
 {
   imports = [
@@ -7,8 +12,8 @@
     ../../nix-os/nvidia.nix
     ../../nix-os/docker.nix
     ../../nix-os/razer.nix
-    ../../nix-os/desktopManagers/gnome.nix
-    ../../nix-os/displayManagers/gdm.nix
+    ../../nix-os/desktopManagers/cosmic.nix
+    ../../nix-os/displayManagers/cosmic-greeter.nix
     ../../nix-os/shell.nix
     ../../nix-os/virtualization.nix
     ../../nix-os/polkit/disable-shutdown.nix
@@ -36,6 +41,10 @@
       hplip
     ];
 
+    nixpkgs.overlays = [
+      self.overlays.cosmicPackages
+    ];
+
     # nixos-vscode-server module needs this
     programs.nix-ld.enable = true;
     services.vscode-server = {