anchor.diff: -{stdenv, fetchFromGitHub, cmake, boost, pkgconfig, doxygen, qt48Full, libharu, 
  -  pango, fcgi, firebird, libmysql, postgresql, graphicsmagick, glew, openssl,
  -  pcre }:
  +{ stdenv, fetchFromGitHub, cmake, boost, pkgconfig, doxygen, qt48Full, libharu
  +, pango, fcgi, firebird, libmysql, postgresql, graphicsmagick, glew, openssl
  +, pcre
  +}:
   
   stdenv.mkDerivation rec {
  -  name = "wt";
  +  name = "wt-${version}";
     version = "4.0.0";
   
     src = fetchFromGitHub {
       owner = "kdeforche";
  -    repo = name;
  +    repo = "wt";
       rev = version;
       sha256 = "1451xxvnx6mlvxg0jxlr1mfv5v18h2214kijk5kacilqashfc43i";
     };
  
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:   enableParallelBuilding = true;
  
    nativeBuildInputs = [ pkgconfig ];
    buildInputs = [
      cmake boost doxygen qt48Full libharu
      pango fcgi firebird libmysql postgresql graphicsmagick glew
      openssl pcre
    ];
  
    cmakeFlags = [
      "-DWT_WRASTERIMAGE_IMPLEMENTATION=GraphicsMagick"
  