{
  description = "System";
  inputs = {
    nixpkgs.url = "github:NixOS/nixpkgs/nixpkgs-unstable";
    flake-utils = {
      url = "github:numtide/flake-utils";
    };
  };

  outputs =
    { nixpkgs, flake-utils, ... }:
    flake-utils.lib.eachDefaultSystem (
      system:
      let
        pkgs = import nixpkgs { inherit system; };
      in
      {
        devShells = {
          default = pkgs.mkShell {
            buildInputs = with pkgs; [
              go
              gopls
              codex
            ];
          };
        };

        packages.default = pkgs.buildGoModule {
          name = "nutdns";
          src = ./.;
          vendorHash = "sha256-4V3cIgEN8WkHHrPz9SRshoiu0C+NHR0Xov1FZ06Q9XI=";
        };
      }
    );
}