add nix system graphics

flake.nix

@@ -3,6 +3,7 @@
     nixpkgs.url = "github:nixos/nixpkgs/nixos-24.11";
     nixpkgs-unstable.url = "github:nixos/nixpkgs/nixos-unstable";
     nixos-hardware.url = "github:NixOS/nixos-hardware/master";
+    nix-vscode-extensions.url = "github:nix-community/nix-vscode-extensions?rev=a81daa13ca23440d8ae219d765140769c4d2f117";
     home-manager = {
       url = "github:nix-community/home-manager/release-24.11";
       inputs.nixpkgs.follows = "nixpkgs";
@@ -11,14 +12,23 @@
       url = "github:nix-community/disko";
       inputs.nixpkgs.follows = "nixpkgs";
     };
-    nix-vscode-extensions.url = "github:nix-community/nix-vscode-extensions?rev=a81daa13ca23440d8ae219d765140769c4d2f117";
-    nixgl.url = "github:nix-community/nixGL";
+    system-manager = {
+      url = "github:numtide/system-manager";
+      inputs.nixpkgs.follows = "nixpkgs";
+    };
+    nix-system-graphics = {
+      url = "github:soupglasses/nix-system-graphics";
+      inputs.nixpkgs.follows = "nixpkgs";
+    };
   };
 
-  outputs = { self, nixpkgs, nixos-hardware, home-manager, ... }@inputs:
+  outputs = { self, nixpkgs, nixos-hardware, home-manager, system-manager, nix-system-graphics, ... }@inputs:
     let
       system = "x86_64-linux";
-      pkgs = nixpkgs.legacyPackages.${system};
+      pkgs = import nixpkgs {
+        inherit system;
+        overlays = [ system-manager.overlays.default ];
+      };
     in
     {
       nixosConfigurations.tuxedo = nixpkgs.lib.nixosSystem {
@@ -39,5 +49,17 @@
         extraSpecialArgs = { inherit inputs; };
         modules = [ ./devices/deck/home.nix ];
       };
+      systemConfigs.deck = system-manager.lib.makeSystemConfig {
+        modules = [
+          nix-system-graphics.systemModules.default
+          {
+            config = {
+              nixpkgs.hostPlatform = "x86_64-linux";
+              system-manager.allowAnyDistro = true;
+              system-graphics.enable = true;
+            };
+          }
+        ];
+      };
     };
 }