anchor.diff:      runHook postInstall
     '';
   
  -  preConfigure =
  -    if withGtk then
  -      "cd gtk"
  -    else
  -      "cd unix";
  +  preAutoreconf = lib.optionalString (!withGtk) "cd unix";
  +  preConfigure = lib.optionalString withGtk "cd gtk";
   
     enableParallelBuilding = true;
   
  
positive.code:     sha256 = "1kay7aj30x0vn8rkylspdycydrzsc0aidjbs0dd238hr5hid723b";
    };
  
    nativeBuildInputs = [
      pkg-config
    ]
    ++ lib.optionals withGtk [
      meson
  
negative.code: { lib
  , stdenv
  , alsa-lib
  , autoreconfHook
  , fetchFromGitHub
  , fetchpatch
  , gtkmm3
  , libepoxy
  , libpng
  