{
  description = "Go + raylib-go sketch project";

  inputs = {
    nixpkgs.url = "github:NixOS/nixpkgs/nixos-25.05";
    flake-utils.url = "github:numtide/flake-utils";
  };

  outputs =
    {
      self,
      nixpkgs,
      flake-utils,
    }:
    flake-utils.lib.eachDefaultSystem (
      system:
      let
        pkgs = import nixpkgs { inherit system; };

        # Your Go module name (optional; buildGoModule can infer from go.mod)
        pname = "sumi";
        version = "0.1.0";

        # Common native deps for raylib + windowing/audio.
        # raylib itself in nixpkgs already brings many deps, but being explicit
        # here makes devShell + builds more predictable.
        nativeDeps = with pkgs; [
          pkg-config
        ];

        raylibDeps = with pkgs; [
          raylib

          # X11 stack (works under XWayland too)
          xorg.libX11
          xorg.libXcursor
          xorg.libXi
          xorg.libXinerama
          xorg.libXrandr

          # Wayland stack (raylib/glfw can use this depending on build/options)
          wayland
          libxkbcommon

          # GL + audio
          mesa
          alsa-lib
          pulseaudio
        ];
      in
      {
        packages.default = pkgs.buildGoModule {
          inherit pname version;

          src = self;

          # raylib-go uses CGO to link against libraylib
          env.CGO_ENABLED = 1;

          # GOFLAGS = [ "-mod=mod" ];
          # proxyVendor = true;

          nativeBuildInputs = nativeDeps;
          buildInputs = raylibDeps;

          # If your main package isn’t at repo root, set this (examples):
          # subPackages = [ "./cmd/sketch" ];

          # First build will fail with a message containing the correct hash.
          vendorHash = "sha256-pcNGzxHripkn9lX2R9O29nYvR+hWLxIev4KJmEhQwC8=";

          # Optional: strip for smaller binaries
          ldflags = [
            "-s"
            "-w"
          ];

          doCheck = false;
        };

        devShells.default = pkgs.mkShell {
          # Tools you want while hacking
          packages = with pkgs; [
            go
            gopls
            delve
            gotools
          ];

          nativeBuildInputs = nativeDeps;
          buildInputs = raylibDeps;

          # Helps CGO find headers/libs
          shellHook = ''
            export CGO_ENABLED=1
          '';
        };
      }
    );
}