anchor.diff:  
   buildPythonPackage rec {
     pname = "uvicorn";
  -  version = "0.17.6";
  +  version = "0.18.1";
     disabled = pythonOlder "3.6";
   
     src = fetchFromGitHub {
       owner = "encode";
       repo = pname;
       rev = version;
  -    hash = "sha256-iJlAU7zZl9X3FcQlJoJ7KlETZOx6WsE9FcpCK4Cm/Fo=";
  +    hash = "sha256-FvdrwBWlBcALiFFAQlsdf2EyExUqsRDER4a+eyVofN0=";
     };
   
     outputs = [
  
positive.code:   ];
  
    propagatedBuildInputs = [
      asgiref
      click
      h11
      httptools
  
negative.code: , buildPythonPackage
  , callPackage
  , fetchFromGitHub
  , click
  , h11
  , httptools
  