anchor.diff: -{ stdenv, fetchurl, qt4, gnuradio, boost, gnuradio-osmosdr
  +{ stdenv, fetchFromGitHub, qt4, gnuradio, boost, gnuradio-osmosdr
   # drivers (optional):
   , rtl-sdr, hackrf
   , pulseaudioSupport ? true, libpulseaudio
  
positive.code:     # it's currently unknown which version of the BSD license that is.
      license = licenses.gpl3Plus;
      platforms = platforms.linux;  # should work on Darwin / OS X too
      maintainers = with maintainers; [ bjornfor the-kenny ];
    };
  }
  
negative.code: 
  stdenv.mkDerivation rec {
    name = "gqrx-${version}";
    version = "2.5.3";
  
    src = fetchFromGitHub {
      owner = "csete";
      repo = "gqrx";
      rev = "v${version}";
      sha256 = "02pavd1kc0gsnrl18bfa01r2f3j4j05zly4a8zwss9yrsgf8432x";
    };
  
    buildInputs = [
  