anchor.diff: -{ stdenv, fetchFromGitHub, cmake, pkgconfig, makeWrapper
  +{ stdenv, mkDerivation, fetchFromGitHub, cmake, pkgconfig, makeWrapper
   , boost, xercesc
   , qtbase, qttools, qtwebkit, qtxmlpatterns
   , python3, python3Packages
   }:
   
  -stdenv.mkDerivation rec {
  +mkDerivation rec {
     name = "sigil-${version}";
     version = "0.9.14";
   
  
positive.code:     description = "Free, open source, multi-platform ebook (ePub) editor";
      homepage = https://github.com/Sigil-Ebook/Sigil/;
      license = licenses.gpl3;
      maintainers =[ maintainers.ramkromberg ];
      platforms = platforms.linux;
    };
  }
  
negative.code: 
    pythonPath = with python3Packages; [ lxml ];
  
    nativeBuildInputs = [ cmake pkgconfig makeWrapper ];
  
    buildInputs = [
      boost xercesc qtbase qttools qtwebkit qtxmlpatterns
      python3Packages.lxml ];
  
    dontWrapQtApps = true;
  
    preFixup = ''
      wrapProgram "$out/bin/sigil" \
         --prefix PYTHONPATH : $PYTHONPATH \
         ''${qtWrapperArgs[@]}
    '';
  
    enableParallelBuilding = true;
  