anchor.diff:    enableParallelBuilding = true;
   
     nativeBuildInputs = [ pkgconfig ];
  -  buildInputs = [ cmake boost doxygen qt48Full libharu 
  -    pango fcgi firebird libmysql postgresql graphicsmagick glew 
  -    openssl pcre ];
  +  buildInputs = [
  +    cmake boost doxygen qt48Full libharu
  +    pango fcgi firebird libmysql postgresql graphicsmagick glew
  +    openssl pcre
  +  ];
   
     cmakeFlags = [
       "-DWT_WRASTERIMAGE_IMPLEMENTATION=GraphicsMagick"
  
positive.code:   meta = with stdenv.lib; {
      homepage = https://www.webtoolkit.eu/wt;
      description = "C++ library for developing web applications";
      platforms = platforms.linux ;
      license = licenses.gpl2;
      maintainers = [ maintainers.juliendehos ];
    };
  
negative.code: { stdenv, fetchFromGitHub, cmake, boost, pkgconfig, doxygen, qt48Full, libharu
  , pango, fcgi, firebird, libmysql, postgresql, graphicsmagick, glew, openssl
  , pcre
  }:
  
  stdenv.mkDerivation rec {
    name = "wt-${version}";
    version = "4.0.0";
  
    src = fetchFromGitHub {
      owner = "kdeforche";
      repo = "wt";
      rev = version;
      sha256 = "1451xxvnx6mlvxg0jxlr1mfv5v18h2214kijk5kacilqashfc43i";
    };
  