anchor.diff: -{ lib, buildPythonPackage, fetchPypi
  +{ lib
  +, buildPythonPackage
  +, fetchPypi
   , hypothesis
   , poetry
   , pydantic
   , pytest
  +, pythonOlder
   }:
   
   buildPythonPackage rec {
  
positive.code:   version = "1.1.4";
    format = "pyproject";
  
    src = fetchPypi {
      inherit pname version;
      sha256 = "1c9jksza0gg2gva3liy0s8riv6imjavhnqw05m8l5660knq2yb2y";
    };
  
    nativeBuildInputs = [
      poetry
  
negative.code:     pytest
    ];
  
    pythonImportsCheck = [
      "hypothesis_auto"
    ];
  
    meta = with lib; {
      description = "Enables fully automatic tests for type annotated functions";
  