anchor.diff:  { buildPythonPackage, lib, fetchgit, isPy3k
  -, git, makeWrapper, sassc, hyperkitty, postorius, whoosh
  +, git, makeWrapper, sassc, hyperkitty, postorius, whoosh, setuptools-scm
   }:
   
   buildPythonPackage rec {
  
positive.code:     sed -i '/^  Django/d' setup.cfg
    '';
  
    nativeBuildInputs = [ git makeWrapper ];
    propagatedBuildInputs = [ hyperkitty postorius whoosh ];
  
    # Tries to check runtime configuration.
  
negative.code:     description = "Django project for Mailman 3 web interface";
      license = licenses.gpl3;
      maintainers = with maintainers; [ peti qyliss ];
    };
  }
  