move nur overlay to flake.nix

configuration.nix

@@ -1,4 +1,4 @@
-{ pkgs, outputs, config, ... }: {
+{ pkgs, config, ... }: {
   imports =
     [
       ./hardware-configuration.nix
@@ -116,27 +116,4 @@
       setSocketVariable = true;
     };
   };
-
-  nixpkgs = {
-    # You can add overlays here
-    overlays = [
-      # Add overlays your own flake exports (from overlays and pkgs dir):
-      outputs.overlays.nurPackages
-
-      # You can also add overlays exported from other flakes:
-      # neovim-nightly-overlay.overlays.default
-
-      # Or define it inline, for example:
-      # (final: prev: {
-      #   hi = final.hello.overrideAttrs (oldAttrs: {
-      #     patches = [ ./change-hello-to-hi.patch ];
-      #   });
-      # })
-    ];
-    # Configure your nixpkgs instance
-    config = {
-      # Disable if you don't want unfree packages
-      allowUnfree = true;
-    };
-  };
 }

flake.nix

@@ -24,15 +24,14 @@
     inherit (self) outputs;
   in
   {
-    overlays = { nurPackages = nur.overlay; };
     nixosConfigurations.pim = nixpkgs.lib.nixosSystem {
       specialArgs = { inherit outputs; };
       system =  "x86_64-linux";
       modules = [
+        { nixpkgs.overlays = [ nur.overlay ]; }
         ./configuration.nix
         agenix.nixosModules.default
         home-manager.nixosModules.home-manager {
-          home-manager.extraSpecialArgs = { inherit nur; };
           home-manager.useGlobalPkgs = true;
           home-manager.useUserPackages = true;
           home-manager.users.pim = {