First pass as Nix build

flake.lock

@@ -0,0 +1,48 @@
+{
+  "nodes": {
+    "nixpkgs": {
+      "locked": {
+        "lastModified": 1729980323,
+        "narHash": "sha256-eWPRZAlhf446bKSmzw6x7RWEE4IuZgAp8NW3eXZwRAY=",
+        "owner": "NixOS",
+        "repo": "nixpkgs",
+        "rev": "86e78d3d2084ff87688da662cf78c2af085d8e73",
+        "type": "github"
+      },
+      "original": {
+        "owner": "NixOS",
+        "ref": "nixpkgs-unstable",
+        "repo": "nixpkgs",
+        "type": "github"
+      }
+    },
+    "root": {
+      "inputs": {
+        "nixpkgs": "nixpkgs",
+        "zmk-nix": "zmk-nix"
+      }
+    },
+    "zmk-nix": {
+      "inputs": {
+        "nixpkgs": [
+          "nixpkgs"
+        ]
+      },
+      "locked": {
+        "lastModified": 1729989359,
+        "narHash": "sha256-sKv7amJel5SZVo/qMO9CytJTT2ehtwU/SqI+x+09mWc=",
+        "owner": "lilyinstarlight",
+        "repo": "zmk-nix",
+        "rev": "1ceefd4eff92f9f6f56bb467beef35d38d9e9a12",
+        "type": "github"
+      },
+      "original": {
+        "owner": "lilyinstarlight",
+        "repo": "zmk-nix",
+        "type": "github"
+      }
+    }
+  },
+  "root": "root",
+  "version": 7
+}

flake.nix

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+{
+  inputs = {
+    nixpkgs.url = "github:NixOS/nixpkgs/nixpkgs-unstable";
+
+    zmk-nix = {
+      url = "github:lilyinstarlight/zmk-nix";
+      inputs.nixpkgs.follows = "nixpkgs";
+    };
+  };
+
+  outputs = { self, nixpkgs, zmk-nix }: let
+    forAllSystems = nixpkgs.lib.genAttrs (nixpkgs.lib.attrNames zmk-nix.packages);
+  in {
+    packages = forAllSystems (system: rec {
+      default = firmware;
+
+      firmware = zmk-nix.legacyPackages.${system}.buildSplitKeyboard {
+        name = "firmware";
+
+        src = nixpkgs.lib.sourceFilesBySuffices self [ ".board" ".cmake" ".conf" ".defconfig" ".dts" ".dtsi" ".json" ".keymap" ".overlay" ".shield" ".yml" "_defconfig" ];
+
+        board = "nice_nano_v2";
+        shield = "lily58_%PART%";
+
+        zephyrDepsHash = "sha256-n7xX/d8RLqDyPOX4AEo5hl/3tQtY6mZ6s8emYYtOYOg=";
+
+        meta = {
+          description = "ZMK firmware";
+          license = nixpkgs.lib.licenses.mit;
+          platforms = nixpkgs.lib.platforms.all;
+        };
+      };
+
+      flash = zmk-nix.packages.${system}.flash.override { inherit firmware; };
+      update = zmk-nix.packages.${system}.update;
+    });
+
+    devShells = forAllSystems (system: {
+      default = zmk-nix.devShells.${system}.default;
+    });
+  };
+}