anchor.diff: -{ stdenv, buildPythonPackage, fetchPypi, makeWrapper
  +{ stdenv, buildPythonPackage, fetchPypi, makeWrapper, pythonOlder, pyyaml
   , python-dateutil, requests, pymongo, raven, bcrypt, flask, pyjwt, flask-cors, psycopg2, pytz, flask-compress, jinja2
   }:
   
  
positive.code:     wrapProgram $out/bin/alertad --prefix PYTHONPATH : "$PYTHONPATH"
    '';
  
    meta = with stdenv.lib; {
      homepage = https://alerta.io;
      description = "Alerta Monitoring System server";
  
negative.code:     sha256 = "5ca2783f6e9211fdebd433b9eae83fbcf75ed127dc87946257d101a7d7a465db";
    };
  
    propagatedBuildInputs = [ python-dateutil requests pymongo raven bcrypt flask pyjwt flask-cors psycopg2 pytz flask-compress jinja2 pyyaml];
  
    doCheck = false; # We can't run the tests from Nix, because they rely on the presence of a working MongoDB server
  
  