anchor.diff: -{ stdenv, fetchurl, python, pyqt5, sip_4_16, poppler, pkgconfig, libpng
  +{ stdenv, fetchurl, python, pyqt5, sip_4_16, poppler_utils, pkgconfig, libpng
   , imagemagick, libjpeg, fontconfig, podofo, qt5, icu, sqlite
   , pil, makeWrapper, unrar, chmlib, pythonPackages, xz, libusb1, libmtp
   , xdg_utils
  
positive.code:     for a in $out/bin/*; do
        wrapProgram $a --prefix PYTHONPATH : $PYTHONPATH \
                       --prefix LD_LIBRARY_PATH : ${unrar}/lib \
                       --prefix PATH : ${poppler}/bin
      done
    '';
  
  
negative.code:   nativeBuildInputs = [ makeWrapper pkgconfig ];
  
    buildInputs =
      [ python pyqt5 sip_4_16 poppler_utils libpng imagemagick libjpeg
        fontconfig podofo qt5 pil chmlib icu sqlite libusb1 libmtp xdg_utils
        pythonPackages.mechanize pythonPackages.lxml pythonPackages.dateutil
        pythonPackages.cssutils pythonPackages.beautifulsoup pythonPackages.pillow
  