anchor.diff:    meta = with lib; {
       description = "Work with email and mailbox by IMAP";
       homepage = "https://github.com/ikvk/imap_tools";
  +    changelog = "https://github.com/ikvk/imap_tools/blob/v${version}/docs/release_notes.rst";
       license = licenses.asl20;
       maintainers = with maintainers; [ dotlambda ];
     };
  
positive.code:     owner = "ikvk";
      repo = "imap_tools";
      rev = "v${version}";
      hash = "sha256-la2+cpTnHZQn/FXtySp+3zDCBTONiLC16Tm+hDiIERc=";
    };
  
    checkInputs = [
  
negative.code: 
  buildPythonPackage rec {
    pname = "imap-tools";
    version = "0.54.0";
  
    disabled = isPy27;
  
  