main system parametrised for mbp

devices/macbook/configuration.nix

@@ -1,4 +1,4 @@
-{pkgs, inputs, ...}: {
+{pkgs, inputs, system, ...}: {
   nixpkgs.config.allowUnfree = true;
 
   environment.systemPackages = with pkgs; [
@@ -80,5 +80,5 @@
   system.stateVersion = 4;
 
   # The platform the configuration will be used on.
-  nixpkgs.hostPlatform = "x86_64-darwin";
+  nixpkgs.hostPlatform = system;
 }

flake.nix

@@ -53,9 +53,16 @@
     darwinConfigurations = {
       "Charless-MacBook-Pro" = nix-darwin.lib.darwinSystem {
         modules = [./devices/macbook/configuration.nix];
-        specialArgs = {inherit inputs;};
+        specialArgs = {
+					inherit inputs;
 					system = "x86_64-darwin";
 				};
       };
+      "mbp-m4" = nix-darwin.lib.darwinSystem {
+        modules = [./devices/macbook/configuration.nix];
+        specialArgs = {inherit inputs;};
+				system = "aarch64-darwin";
+      };
+    };
   };
 }