anchor.diff:  { stdenv, buildPythonPackage, fetchPypi, makeWrapper
  -, six, click, requests, pytz, tabulate
  +, six, click, requests, pytz, tabulate, pythonOlder
   }:
   
   buildPythonPackage rec {
  
positive.code:     sha256 = "f9f0f8f800798fae83c05dd52dc2f06bd77fb318c784c4b44e3acfba81338881";
    };
  
    buildInputs = [ six click requests pytz tabulate ];
  
    doCheck = false;
  
  
negative.code:     wrapProgram $out/bin/alerta --prefix PYTHONPATH : "$PYTHONPATH"
    '';
  
    disabled = pythonOlder "3.5";
  
    meta = with stdenv.lib; {
      homepage = https://alerta.io;
      description = "Alerta Monitoring System command-line interface";
  