I've been using this for a while, will now change some thing

desktop.nix

@@ -2,12 +2,13 @@
 
 {
   services = {
+    displayManager.cosmic-greeter.enable = true;
+    desktopManager.cosmic.enable = true;
     libinput.enable = true;
     xserver = {
       enable = true;
       xkb.variant = "us";
       xkb.layout = "nl";
-      displayManager.gdm.enable = true;
       desktopManager = {
         gnome.enable = true;
         xterm.enable = false;

flake.lock

@@ -1,5 +1,21 @@
 {
   "nodes": {
+    "flake-compat": {
+      "flake": false,
+      "locked": {
+        "lastModified": 1717312683,
+        "narHash": "sha256-FrlieJH50AuvagamEvWMIE6D2OAnERuDboFDYAED/dE=",
+        "owner": "nix-community",
+        "repo": "flake-compat",
+        "rev": "38fd3954cf65ce6faf3d0d45cd26059e059f07ea",
+        "type": "github"
+      },
+      "original": {
+        "owner": "nix-community",
+        "repo": "flake-compat",
+        "type": "github"
+      }
+    },
     "flake-utils": {
       "inputs": {
         "systems": "systems"
@@ -68,6 +84,27 @@
         "url": "https://git.lix.systems/lix-project/nixos-module/archive/2.91.0.tar.gz"
       }
     },
+    "nixos-cosmic": {
+      "inputs": {
+        "flake-compat": "flake-compat",
+        "nixpkgs": "nixpkgs",
+        "nixpkgs-stable": "nixpkgs-stable",
+        "rust-overlay": "rust-overlay"
+      },
+      "locked": {
+        "lastModified": 1728616391,
+        "narHash": "sha256-xFQpxbBYaPktRuM9XBEJfWKGbq8odEikZP77+d/0o44=",
+        "owner": "lilyinstarlight",
+        "repo": "nixos-cosmic",
+        "rev": "c0fe031a0bb89e6641f9ab3fb0d413babe4845d4",
+        "type": "github"
+      },
+      "original": {
+        "owner": "lilyinstarlight",
+        "repo": "nixos-cosmic",
+        "type": "github"
+      }
+    },
     "nixos-hardware": {
       "locked": {
         "lastModified": 1727665282,
@@ -85,6 +122,38 @@
       }
     },
     "nixpkgs": {
+      "locked": {
+        "lastModified": 1728492678,
+        "narHash": "sha256-9UTxR8eukdg+XZeHgxW5hQA9fIKHsKCdOIUycTryeVw=",
+        "owner": "NixOS",
+        "repo": "nixpkgs",
+        "rev": "5633bcff0c6162b9e4b5f1264264611e950c8ec7",
+        "type": "github"
+      },
+      "original": {
+        "owner": "NixOS",
+        "ref": "nixos-unstable",
+        "repo": "nixpkgs",
+        "type": "github"
+      }
+    },
+    "nixpkgs-stable": {
+      "locked": {
+        "lastModified": 1728500571,
+        "narHash": "sha256-dOymOQ3AfNI4Z337yEwHGohrVQb4yPODCW9MDUyAc4w=",
+        "owner": "NixOS",
+        "repo": "nixpkgs",
+        "rev": "d51c28603def282a24fa034bcb007e2bcb5b5dd0",
+        "type": "github"
+      },
+      "original": {
+        "owner": "NixOS",
+        "ref": "nixos-24.05",
+        "repo": "nixpkgs",
+        "type": "github"
+      }
+    },
+    "nixpkgs_2": {
       "locked": {
         "lastModified": 1727802920,
         "narHash": "sha256-HP89HZOT0ReIbI7IJZJQoJgxvB2Tn28V6XS3MNKnfLs=",
@@ -102,8 +171,30 @@
     "root": {
       "inputs": {
         "lix-module": "lix-module",
+        "nixos-cosmic": "nixos-cosmic",
         "nixos-hardware": "nixos-hardware",
-        "nixpkgs": "nixpkgs"
+        "nixpkgs": "nixpkgs_2"
+      }
+    },
+    "rust-overlay": {
+      "inputs": {
+        "nixpkgs": [
+          "nixos-cosmic",
+          "nixpkgs"
+        ]
+      },
+      "locked": {
+        "lastModified": 1728527353,
+        "narHash": "sha256-GY755PX8CbGH3O9iKqauhkFTdP9WSKcOfOkZBe3SOqw=",
+        "owner": "oxalica",
+        "repo": "rust-overlay",
+        "rev": "94749eee5a2b351b6893d5bddb0a18f7f01251ac",
+        "type": "github"
+      },
+      "original": {
+        "owner": "oxalica",
+        "repo": "rust-overlay",
+        "type": "github"
       }
     },
     "systems": {

flake.nix

@@ -4,6 +4,7 @@
   inputs = {
     nixos-hardware.url = "github:NixOS/nixos-hardware/master";
     nixpkgs.url = "nixpkgs/nixos-unstable";
+    nixos-cosmic.url = "github:lilyinstarlight/nixos-cosmic";
     lix-module = {
       url = "https://git.lix.systems/lix-project/nixos-module/archive/2.91.0.tar.gz";
       inputs.nixpkgs.follows = "nixpkgs";
@@ -13,7 +14,8 @@
   outputs = { 
     self, 
     nixos-hardware, 
-    nixpkgs, 
+    nixpkgs,
+    nixos-cosmic, 
     lix-module,
     ... 
   }@inputs:
@@ -31,6 +33,7 @@
       laptop = lib.nixosSystem {
         inherit system;
         modules = [
+          nixos-cosmic.nixosModules.default
 	        nixos-hardware.nixosModules.framework-11th-gen-intel
           lix-module.nixosModules.default
           ./users.nix

packages.nix

@@ -19,6 +19,7 @@
     ];
     # Systemwide installed packages
     systemPackages = with pkgs; [
+      glib
       bottom
       curl
       wget
@@ -34,12 +35,18 @@
       firefox
       thunderbird
       blackbox-terminal
+      processing
       apostrophe
       onlyoffice-bin
       keepassxc
       stremio
       vesktop
       signal-desktop
+      quickemu
+      spotify
+      vlc
+      inkscape
+      godot_4
     ];
   };
 

programs.nix

@@ -12,5 +12,9 @@
         theme = "gnzh";
       };
     };
+
+    steam = {
+      enable = true;
+    };
   };
 }

settings.nix

@@ -5,6 +5,7 @@
       experimental-features = "nix-command flakes";
       # Deduplicate and optimize nix store
       auto-optimise-store = true;
+      sandbox = false;
     };
   };