anchor.diff:    # Next release should address it with
     #     https://github.com/PortAudio/portaudio/commit/28d2781d9216115543aa3f0a0ffb7b4ee0fac551.patch
     enableParallelBuilding = false;
  +
  +  postPatch = ''
  +    # workaround for the configure script which expects an absolute path
  +    export AR=$(which $AR)
  +  '';
   
     # not sure why, but all the headers seem to be installed by the make install
     installPhase = ''
  
positive.code:     sha256 = "1vrdrd42jsnffh6rq8ap2c6fr4g9fcld89z649fs06bwqx1bzvs7";
    };
  
    nativeBuildInputs = [ pkg-config ];
    buildInputs = lib.optional (!stdenv.isDarwin) alsa-lib;
  
    configureFlags = [ "--disable-mac-universal" "--enable-cxx" ];
  
negative.code: , fetchurl
  , alsa-lib
  , pkg-config
  , which
  , AudioUnit
  , AudioToolbox
  , CoreAudio
  