anchor.diff:  
       nativeBuildInputs = [
         ninja which python2Packages.python perl pkgconfig
  -      python2Packages.ply python2Packages.jinja2
  +      python2Packages.ply python2Packages.jinja2 nodejs
       ];
   
       buildInputs = defaultDependencies ++ [
  
positive.code:       }' gpu/config/gpu_control_list.cc
  
        patchShebangs .
      '' + optionalString (versionAtLeast version "52.0.0.0") ''
        sed -i -re 's/([^:])\<(isnan *\()/\1std::\2/g' \
          third_party/pdfium/xfa/fxbarcode/utils.h
  
negative.code: { stdenv, ninja, which, nodejs
  
  # default dependencies
  , bzip2, flac, speex, libopus
  