anchor.diff:  buildPythonPackage rec {
     pname = "pygls";
     version = "0.11.3";
  +  format = "setuptools";
     disabled = !isPy3k;
   
     src = fetchFromGitHub {
  
positive.code: , fetchFromGitHub
  , setuptools-scm
  , pydantic
  , typeguard
  , mock
  , pytest-asyncio
  
negative.code: 
    propagatedBuildInputs = [
      pydantic
      toml
      typeguard
    ];
    # We don't know why an early version of pydantic is required, see:
  