snowhawk: remove configuration hostPlatform

I handle this at the flake level

builders.nix

@@ -1,4 +1,4 @@
-{ nixpkgs, self, ... }@inputs:
+{ nixpkgs, nix-darwin, self, ... }@inputs:
 
 let
   makePkgs = system: (import nixpkgs {
@@ -73,4 +73,34 @@ rec {
       builtins.listToAttrs
       (map toPartialHomeManagerConfig)
       systems;
+
+
+  toPartialDarwinConfig =
+    { hostname, system ? "aarch64-darwin", }:
+    nameValuePair
+      hostname
+      (nix-darwin.lib.darwinSystem rec {
+        pkgs = makePkgs system;
+        specialArgs = { inherit inputs self; };
+
+        modules = [
+          inputs.home-manager.darwinModules.home-manager
+          ./hosts/${hostname}/configuration.nix
+
+
+          {
+            home-manager.extraSpecialArgs = {
+              inherit inputs self pkgs;
+              lib = pkgs.lib.extend (_: _: inputs.home-manager.lib);
+            };
+          }
+        ];
+      });
+
+  compileDarwinSystems =
+    systems:
+    lib.right
+      builtins.listToAttrs
+      (map toPartialDarwinConfig)
+      systems;
 }

flake.lock

@@ -482,6 +482,26 @@
         "type": "github"
       }
     },
+    "nix-darwin": {
+      "inputs": {
+        "nixpkgs": [
+          "nixpkgs"
+        ]
+      },
+      "locked": {
+        "lastModified": 1730765507,
+        "narHash": "sha256-u2KaQonCkHQbQvYrfZz7OJuyOrFelbfh5gS9L43c1WY=",
+        "owner": "LnL7",
+        "repo": "nix-darwin",
+        "rev": "5d891207854e792a33b5984e9bee56c8b57ef010",
+        "type": "github"
+      },
+      "original": {
+        "owner": "LnL7",
+        "repo": "nix-darwin",
+        "type": "github"
+      }
+    },
     "nix-github-actions": {
       "inputs": {
         "nixpkgs": [
@@ -606,6 +626,7 @@
         "lix-module": "lix-module",
         "neovim-overlay": "neovim-overlay",
         "niri": "niri",
+        "nix-darwin": "nix-darwin",
         "nixpkgs": "nixpkgs_2",
         "repo-clone": "repo-clone",
         "sops-nix": "sops-nix",

flake.nix

@@ -11,6 +11,8 @@
     dunst-theme = { url = "github:d2718nis/rose-pine-dunst"; flake = false; };
     niri = { url = "github:sodiboo/niri-flake"; inputs.nixpkgs.follows = "nixpkgs"; };
 
+    nix-darwin = { url = "github:LnL7/nix-darwin"; inputs.nixpkgs.follows = "nixpkgs"; };
+
     repo-clone.url = "git+https://git.zynh.me/Zynh0722/repo-clone";
     fish_theme = { url = "git+https://git.zynh.me/Zynh0722/omf-theme"; flake = false; };
     backgrounds = { url = "git+https://git.zynh.me/Zynh0722/backgrounds"; inputs.nixpkgs.follows = "nixpkgs"; };
@@ -30,11 +32,10 @@
       homeConfigurations = builders.compileHomes [
         { user = "zynh"; hostname = "msiserver"; }
         { user = "val"; hostname = "caveserver"; }
-        {
-          user = "zynh";
-          hostname = "little-lightning";
-          system = "aarch64-darwin";
-        }
+      ];
+
+      darwinConfigurations = builders.compileDarwinSystems [
+        { hostname = "little-lightning"; }
       ];
 
       overlays.default = import ./pkgs;

hosts/little-lightning/configuration.nix

@@ -0,0 +1,31 @@
+{ pkgs, self, ... }: {
+  # List packages installed in system profile. To search by name, run:
+  # $ nix-env -qaP | grep wget
+  environment.systemPackages = [ ];
+
+  nix.settings = {
+    experimental-features = [ "nix-command" "flakes" ];
+    auto-optimise-store = true;
+  };
+
+  # Auto upgrade nix package and the daemon service.
+  services.nix-daemon.enable = true;
+
+  # Enable alternative shell support in nix-darwin.
+  # programs.fish.enable = true;
+
+  users.users.zynh = {
+    name = "zynh";
+    home = "/Users/zynh";
+  };
+
+  home-manager = {
+    users = { "zynh" = import ./home.nix; };
+    backupFileExtension = "backup";
+  };
+
+  # Set Git commit hash for darwin-version.
+  system.configurationRevision = self.rev or self.dirtyRev or null;
+  # $ darwin-rebuild changelog
+  system.stateVersion = 5;
+}

hosts/little-lightning/home.nix

@@ -5,14 +5,6 @@
     ../../home/modules
   ];
 
-  nix = {
-    package = pkgs.nix;
-    settings = {
-      auto-optimise-store = true;
-      experimental-features = [ "nix-command" "flakes" ];
-    };
-  };
-
   snowhawk = {
     alacritty.enable = true;
     macos.enable = true;
@@ -38,7 +30,7 @@
   home.packages = with pkgs; [
     nix-output-monitor
     (writeShellScriptBin "rebuild" ''
-      home-manager switch --flake ~/nixos#zynh@little-lightning |& nom
+      darwin-rebuild switch --flake ~/nixos#little-lightning |& nom
     '')
 
     wakeonlan