anchor.diff:  
     propagatedBuildInputs = [ pillow prettytable pyyaml dateutil
       gdata requests mechanize feedparser lxml gnupg pyqt5 libyaml
  -    simplejson cssselect futures pdfminer termcolor google_api_python_client
  -    html2text unidecode ];
  +    simplejson cssselect futures pdfminer termcolor
  +    google_api_python_client_python27 html2text unidecode ];
   
     checkPhase = ''
       nosetests
  
positive.code: { buildPythonPackage, fetchurl, stdenv, isPy27
  , nose, pillow, prettytable, pyyaml, dateutil, gdata
  , requests, mechanize, feedparser, lxml, gnupg, pyqt5
  , libyaml, simplejson, cssselect, futures, pdfminer
  
negative.code: , unidecode
  }:
  
  let
    # Support for Python 2.7 was dropped in 1.7.7
    google_api_python_client_python27 = google_api_python_client.overrideDerivation
      (oldAttrs: rec {
        pname = "google-api-python-client";
        version = "1.7.6";
        src = fetchPypi {
          inherit pname version;
          sha256 = "14w5sdrp0bk9n0r2lmpqmrbf2zclpfq6q7giyahnskkfzdkb165z";
        };
      });
  in buildPythonPackage rec {
    pname = "weboob";
    version = "1.3";
    disabled = ! isPy27;
  