flake: add nix-darwin

flake.lock

@@ -69,6 +69,26 @@
         "type": "github"
       }
     },
+    "nix-darwin": {
+      "inputs": {
+        "nixpkgs": [
+          "nixpkgs"
+        ]
+      },
+      "locked": {
+        "lastModified": 1743496612,
+        "narHash": "sha256-emPWa5lmKbnyuj8c1mSJUkzJNT+iJoU9GMcXwjp2oVM=",
+        "owner": "LnL7",
+        "repo": "nix-darwin",
+        "rev": "73d59580d01e9b9f957ba749f336a272869c42dd",
+        "type": "github"
+      },
+      "original": {
+        "owner": "LnL7",
+        "repo": "nix-darwin",
+        "type": "github"
+      }
+    },
     "nixos-facter-modules": {
       "locked": {
         "lastModified": 1743671943,
@@ -102,6 +122,7 @@
         "data-mesher": "data-mesher",
         "disko": "disko",
         "flake-parts": "flake-parts",
+        "nix-darwin": "nix-darwin",
         "nixos-facter-modules": "nixos-facter-modules",
         "nixpkgs": "nixpkgs",
         "sops-nix": "sops-nix",

flake.nix

@@ -4,6 +4,9 @@
   inputs = {
     nixpkgs.url = "https://nixos.org/channels/nixpkgs-unstable/nixexprs.tar.xz";
 
+    nix-darwin.url = "github:LnL7/nix-darwin";
+    nix-darwin.inputs.nixpkgs.follows = "nixpkgs";
+
     flake-parts.url = "github:hercules-ci/flake-parts";
     flake-parts.inputs.nixpkgs-lib.follows = "nixpkgs";