wip: dnsc-machine setup

flake.nix

@@ -55,9 +55,26 @@
       nixosModules.steam = import ./modules/steam;
       nixosModules.niriSystem = import ./modules/wm/niri-system;
 
+      # Overlays
+      overlays.default = final: prev: {
+        python3 = prev.python3.override {
+          packageOverrides = pyFinal: pyPrev: {
+            python-dbusmock = pyPrev.python-dbusmock.overridePythonAttrs (_: {
+              doCheck = false;
+            });
+          };
+        };
+      };
+
       nixosConfigurations.dnsc-machine = nixpkgs.lib.nixosSystem {
         system = "x86_64-linux";
         specialArgs = { inherit inputs outputs; };
+        pkgs = import nixpkgs {
+          system = "x86_64-linux";
+          overlays = [
+            self.overlays.default
+          ];
+        };
         modules = [
           ./hosts/dnsc-machine
         ];

hosts/dnsc-machine/default.nix

@@ -6,9 +6,6 @@
   ...
 }:
 
-let
-  backportPkgs = inputs.nixpkgs-backport-fix.legacyPackages.${pkgs.stdenv.hostPlatform.system};
-in
 {
   imports = [
     # Include the results of the hardware scan.
@@ -32,16 +29,6 @@ in
   # in modules/default.nix
   nixpkgs.overlays = [
     inputs.zellij-switch.overlays.default
-
-    (final: prev: {
-      python3Packages = prev.python3Packages.overrideScope (
-        pyFinal: pyPrev: {
-          python-dbusmock = pyPrev.python-dbusmock.overridePythonAttrs (old: {
-            doCheck = false;
-          });
-        }
-      );
-    })
   ];
 
   # General settings