anchor.diff:  , pytz
   , six
   , sqlalchemy
  +, sqlalchemy-continuum
   , werkzeug
   , wtforms
   , psycopg2 # optional, for postgresql support
  
positive.code:     pytz
      six
      sqlalchemy
      werkzeug
      wtforms
      psycopg2
    ];
  
    checkInputs = [
  
negative.code: 
  buildPythonPackage rec {
    pname = "ihatemoney";
    version = "4.2";
  
    src = fetchFromGitHub {
      owner = "spiral-project";
      repo = pname;
      rev = version;
      sha256 = "0d4vc6m0jkwlz9ly0hcjghccydvqbldh2jb8yzf94jrgkd5fd7k1";
    };
  
    patchPhase = ''
      # remove draconian pinning
      sed -i 's/==.*$//' setup.cfg
    '';
  
    propagatedBuildInputs = [
      alembic
  