anchor.diff:    enableParallelBuilding = true;
   
     meta = with stdenv.lib; {
  -    description = "QT Tox client";
  +    description = "Qt Tox client";
       license = licenses.gpl3;
  -    maintainers = with maintainers; [ viric jgeerds ];
  +    maintainers = with maintainers; [ viric jgeerds akaWolf ];
       platforms = platforms.all;
     };
   }
  
positive.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-20150821";
  
    src = fetchgit {
        url = "https://github.com/tux3/qTox.git";
        rev = "2f6b5e052f2a625d506e83f880c5d68b49118f95";
        md5 = "b2f9cf283136b6e558876ca2e6d128a3";
    };
  
  
negative.code:   nativeBuildInputs = [ pkgconfig ];
  
    preConfigure = ''
      # patch .pro file for proper set of the git hash
      sed -i '/git rev-parse/d' qtox.pro
      sed -i 's/$$quote($$GIT_VERSION)/${revision}/' qtox.pro
      # since .pro have hardcoded paths, we need to explicitly set paths here
      export NIX_CFLAGS_COMPILE="$NIX_CFLAGS_COMPILE $(pkg-config --cflags glib-2.0)"
      export NIX_CFLAGS_COMPILE="$NIX_CFLAGS_COMPILE $(pkg-config --cflags gdk-pixbuf-2.0)"
      export NIX_CFLAGS_COMPILE="$NIX_CFLAGS_COMPILE $(pkg-config --cflags gtk+-2.0)"
  