[nix] Messing around with how to override desktop files

flake.nix

@@ -32,12 +32,36 @@
 
   outputs =
     { self, nixpkgs, ... }@inputs:
+    let
+      local = import ./lib;
+      mkNixosConfig =
+        {
+          path,
+          system ? "x86_64-linux",
+          nixpkgs ? inputs.nixpkgs-unstable,
+        }:
+        nixpkgs.lib.nixosSystem {
+          inherit system;
+          modules = [
+            inputs.home-manager.nixosModules.home-manager
+            {
+              home-manager.useGlobalPkgs = true;
+              home-manager.useUserPackages = true;
+              home-manager.extraSpecialArgs = {
+                inherit inputs local;
+              };
+            }
+            path
+          ];
+          specialArgs = {
+            inherit inputs local;
+          };
+        };
+    in
     {
       nixosConfigurations = {
-        altair = (import ./system/hosts/altair) {
-          inherit inputs;
-          inherit self;
-          nixpkgs = inputs.nixpkgs-unstable;
+        altair = mkNixosConfig {
+          path = ./system/hosts/altair;
         };
         mcp = (import ./system/hosts/mcp) {
           inherit inputs;