完成，一个小玩具

flake.nix

@@ -0,0 +1,36 @@
+{
+  inputs = {
+    nixpkgs.url = "github:NixOS/nixpkgs/nixpkgs-unstable";
+    utils.url = "github:numtide/flake-utils";
+    treefmt-nix.url = "github:numtide/treefmt-nix";
+  };
+
+  outputs =
+    {
+      self,
+      nixpkgs,
+      treefmt-nix,
+      utils,
+      ...
+    }:
+    utils.lib.eachDefaultSystem (
+      system:
+      let
+        pkgs = import nixpkgs { inherit system; };
+        treefmtEval = treefmt-nix.lib.evalModule pkgs ./treefmt.nix;
+        inherit (pkgs) mkShell;
+      in
+      rec {
+        formatter = treefmtEval.config.build.wrapper;
+        devShell = mkShell {
+          nativeBuildInputs = with pkgs; [
+            tokei
+            nil
+          ];
+        };
+
+        packages.lmxg-mu50 = pkgs.callPackage ./package.nix { };
+        defaultPackage = packages.lmxg-mu50;
+      }
+    );
+}