anchor.diff:    installPhase = ''
       mkdir -p $out/bin
       cp qtox $out/bin
  +    wrapProgram $out/bin/qtox \
  +      --prefix QT_PLUGIN_PATH : ${qt5.svg}/lib/qt5/plugins
     '';
  +
  +  enableParallelBuilding = true;
   
     meta = with stdenv.lib; {
       description = "QT Tox client";
  
positive.code:     maintainers = with maintainers; [ viric jgeerds ];
      platforms = platforms.all;
    };
  }
  
  
negative.code: { stdenv, fetchgit, pkgconfig, libtoxcore-dev, qt5, openal, opencv,
    libsodium, libXScrnSaver, glib, gdk_pixbuf, gtk2, cairo,
    pango, atk, qrencode, ffmpeg, filter-audio, makeWrapper }:
  
  stdenv.mkDerivation rec {
    name = "qtox-dev-20150624";
  