Architecture split.

flake.nix

@@ -2,23 +2,36 @@
   description = "Starter configuration for macOS with nix-darwin";
 
   inputs = {
-    nixpkgs = {
+    nixpkgsAarch64 = {
-      url = "github:nixos/nixpkgs//nixpkgs-26.05-darwin";
+      url = "github:nixos/nixpkgs/nixpkgs-unstable";
-      #      url = "github:nixos/nixpkgs/nixpkgs-unstable";
     };
 
-    home-manager = {
+    nixpkgsX86 = {
+      url = "github:nixos/nixpkgs//nixpkgs-26.05-darwin";
+    };
+
+    homeManagerAarch64 = {
       url = "github:nix-community/home-manager";
+      inputs.nixpkgs.follows = "nixpkgsAarch64";
+    };
+
+    homeManagerX86 = {
+      url = "github:nix-community/home-manager/release-26.05";
+      inputs.nixpkgs.follows = "nixpkgsX86";
     };
 
     nixd = {
       url = "github:nix-community/nixd";
     };
 
-    darwin = {
+    darwinAarch64 = {
-      #     url = "github:nix-darwin/nix-darwin";
+      url = "github:nix-darwin/nix-darwin";
+      inputs.nixpkgs.follows = "nixpkgsAarch64";
+    };
+
+    darwinX86 = {
       url = "github:nix-darwin/nix-darwin/nix-darwin-26.05";
-      inputs.nixpkgs.follows = "nixpkgs";
+      inputs.nixpkgs.follows = "nixpkgsX86";
     };
 
     brew-src = {
@@ -43,7 +56,7 @@
 
     sops-nix = {
       url = "github:Mic92/sops-nix";
-      inputs.nixpkgs.follows = "nixpkgs";
+      inputs.nixpkgs.follows = "nixpkgsAarch64";
     };
 
     nix-vscode-extensions = {
@@ -67,12 +80,15 @@
   outputs =
     {
       self,
-      darwin,
+      darwinAarch64,
+      darwinX86,
       nix-homebrew,
       homebrew-core,
       homebrew-cask,
-      home-manager,
+      homeManagerAarch64,
-      nixpkgs,
+      homeManagerX86,
+      nixpkgsAarch64,
+      nixpkgsX86,
       nixd,
       sops-nix,
       nix-vscode-extensions,
@@ -82,17 +98,33 @@
     }@inputs:
     let
       user = "olaf";
+      lib = nixpkgsAarch64.lib;
       darwinSystems = [
         "aarch64-darwin"
         "x86_64-darwin"
       ];
 
-      forAllSystems = f: nixpkgs.lib.genAttrs darwinSystems f;
+      perSystem = {
+        aarch64-darwin = {
+          nixpkgs = nixpkgsAarch64;
+          darwin = darwinAarch64;
+          home-manager = homeManagerAarch64;
+          pkgs = nixpkgsAarch64.legacyPackages.aarch64-darwin;
+        };
+        x86_64-darwin = {
+          nixpkgs = nixpkgsX86;
+          darwin = darwinX86;
+          home-manager = homeManagerX86;
+          pkgs = nixpkgsX86.legacyPackages.x86_64-darwin;
+        };
+      };
+
+      forAllSystems = f: lib.genAttrs darwinSystems f;
 
       devShell =
         system:
         let
-          pkgs = nixpkgs.legacyPackages.${system};
+          pkgs = perSystem.${system}.pkgs;
         in
         {
           default =
@@ -125,12 +157,17 @@
             };
         };
 
-      mkApp = scriptName: system: {
+      mkApp =
+        scriptName: system:
+        let
+          pkgs = perSystem.${system}.pkgs;
+        in
+        {
           type = "app";
           program = "${
-          (nixpkgs.legacyPackages.${system}.writeScriptBin scriptName ''
+            (pkgs.writeScriptBin scriptName ''
             #!/usr/bin/env bash
-            PATH=${nixpkgs.legacyPackages.${system}.git}/bin:$PATH
+            PATH=${pkgs.git}/bin:$PATH
             echo "Running ${scriptName} for ${system}"
             sudo chmod +x ${self}/apps/${system}/${scriptName}
             exec ${self}/apps/${system}/${scriptName}
@@ -147,15 +184,23 @@
     in
     {
       devShells = forAllSystems devShell;
-      apps = nixpkgs.lib.genAttrs darwinSystems mkDarwinApps;
+      apps = lib.genAttrs darwinSystems mkDarwinApps;
 
-      darwinConfigurations = nixpkgs.lib.genAttrs darwinSystems (
+      darwinConfigurations = lib.genAttrs darwinSystems (
         system:
-        darwin.lib.darwinSystem {
+        let
+          systemConfig = perSystem.${system};
+        in
+        systemConfig.darwin.lib.darwinSystem {
           inherit system;
-          specialArgs = inputs // { inherit system; };
+          specialArgs = inputs // {
+            inherit system;
+            nixpkgs = systemConfig.nixpkgs;
+            darwin = systemConfig.darwin;
+            home-manager = systemConfig.home-manager;
+          };
           modules = [
-            home-manager.darwinModules.home-manager
+            systemConfig.home-manager.darwinModules.home-manager
             nix-homebrew.darwinModules.nix-homebrew
             {
               nix-homebrew = {
@@ -170,7 +215,7 @@
               };
 
               home-manager.sharedModules =
-                nixpkgs.lib.optionals (system != "x86_64-darwin") [
+                lib.optionals (system != "x86_64-darwin") [
                   catppuccin.homeModules.catppuccin
                 ];
             }