{
  inputs.nixpkgs.url = "github:nixos/nixpkgs/nixpkgs-unstable";

  outputs = {
    self,
    nixpkgs,
  }: let
    system = "aarch64-darwin";
    pkgs = nixpkgs.legacyPackages.${system};
  in {
    devShells.${system}.default = pkgs.mkShell {
      # pkg-config is needed for CMake to "see" the library
      nativeBuildInputs = [pkgs.pkg-config];
      buildInputs = [pkgs.libjpeg_turbo];

      shellHook = ''
        export PKG_CONFIG_PATH="${pkgs.libjpeg_turbo.dev}/lib/pkgconfig:$PKG_CONFIG_PATH"
        export C_INCLUDE_PATH="${pkgs.libjpeg_turbo.dev}/include:$C_INCLUDE_PATH"
        export LIBRARY_PATH="${pkgs.libjpeg_turbo}/lib:$LIBRARY_PATH"
        echo "✅ Environment ready: libturbojpeg and pkg-config loaded."
      '';
    };
  };
}