anchor.diff:  , poppler
   , popt
   , pythonPackages
  -, pyxml
   , xorg
   , zlib
   
  
positive.code:   /* Make sure PyXML modules can be found at run-time. */ ''
      for i in "$out/bin/"* ; do
        wrapProgram "$i" \
          --prefix PYTHONPATH : "$(toPythonPath ${pyxml})" \
          --prefix PYTHONPATH : "$(toPythonPath ${pythonPackages.lxml})" \
          --prefix PATH : ${pythonPackages.python}/bin
      done
  
negative.code:   propagatedBuildInputs = [
      /* Python is used at run-time to execute scripts, e.g.
         those in the "Effects" menu. */
      pythonPackages.lxml
      pythonPackages.python
      pythonPackages.pyxml
    ];
  
    buildInputs = [
  