changed rpi config

flake.nix

@@ -32,12 +32,19 @@
   outputs = inputs@{ self, nixpkgs, nixpkgs-unstable, home-manager, nix-colors, stylix, nixos-cosmic, sops-nix, disko, ... }:
   let
     system = "x86_64-linux";
+    system-arm = "aarch64-linux";
     overlay-unstable = final: prev: {
       unstable = import nixpkgs-unstable {
         config.allowUnfree = true;
         localSystem = { inherit system; };
       };
     };
+    overlay-unstable-arm = final: prev: {
+      unstable = import nixpkgs-unstable {
+        config.allowUnfree = true;
+        localSystem = { inherit system-arm; };
+      };
+    };
   in 
   {
     nixosConfigurations = {
@@ -163,12 +170,7 @@
         pkgs = nixpkgs.legacyPackages.aarch64-linux;
         extraSpecialArgs = { inherit inputs nix-colors; };
         modules = [
-          ({ config, pkgs, ... }: { nixpkgs.overlays = [ final: prev: {
-      unstable = import nixpkgs-unstable {
-        config.allowUnfree = true;
-        localSystem = { inherit "aarch64-linux"; };
-      };
-    } ]; })
+          ({ config, pkgs, ... }: { nixpkgs.overlays = [ overlay-unstable ]; })
         
           ./hosts/p-th-rpi-01/home.nix
         ];