anchor.diff:  
   buildPythonPackage rec {
     pname = "starlette";
  -  version = "0.16.0";
  +  version = "0.17.1";
  +  format = "setuptools";
  +
     disabled = pythonOlder "3.6";
   
     src = fetchFromGitHub {
       owner = "encode";
       repo = pname;
       rev = version;
  -    sha256 = "sha256-/NYhRRZdi6I7CtLCohAqK4prsSUayOxa6sBKIJhPv+w=";
  +    sha256 = "sha256-qT/w7r8PsrauLoBolwCGpxiwhDZo3z6hIqKVXeY5yqA=";
     };
   
     postPatch = ''
  
positive.code:     typing-extensions
    ];
  
    disabledTestPaths = [
      # fails to import graphql, but integrated graphql support is about to
      # be removed in 0.15, see https://github.com/encode/starlette/pull/1135.
      "tests/test_graphql.py"
    ];
  
    disabledTests = [
      # asserts fail due to inclusion of br in Accept-Encoding
      "test_websocket_headers"
      "test_request_headers"
    ];
  
    pythonImportsCheck = [ "starlette" ];
  
    meta = with lib; {
      homepage = "https://www.starlette.io/";
  
negative.code: , aiofiles
  , anyio
  , contextlib2
  , itsdangerous
  , jinja2
  , python-multipart
  