anchor.diff:      sha256 = "12mgxs1ndhdjjkydx48b95na9k9h0disfqgrr6wxx7vda6dqvcwz";
     };
   
  -  propagatedBuildInputs = [
  +  propagatedBuildInputs = with pythonOverride.pkgs; [
       aiosmtpd
       alembic
       authheaders
  
positive.code:       });
      };
    };
  
  in
  
  with py.pkgs;
  
  buildPythonPackage rec {
    pname = "mailman";
  
negative.code: { lib, buildPythonPackage, fetchPypi, fetchpatch, pythonOlder, python3, postfix, lynx
  }:
  
  let
    # Mailman does not support sqlalchemy >= 1.4 https://gitlab.com/mailman/mailman/-/issues/845
    pythonOverride = python3.override {
      packageOverrides = self: super: {
        sqlalchemy = super.sqlalchemy.overridePythonAttrs (oldAttrs: rec {
          version = "1.3.24";
          src = oldAttrs.src.override {
  