anchor.diff:    nativeBuildInputs = [
       git
       poetry-core
  +    pytestCheckHook
     ];
   
     propagatedBuildInputs = [
  
positive.code: , peewee
  , cachetools
  , atomicwrites
  }:
  
  buildPythonPackage rec {
  
negative.code:     atomicwrites
    ];
  
    checkInputs = [
      faker
      aioresponses
      hypothesis
      pytest-aiohttp
      pytest-benchmark
    ];
  
    disabledTests = [
      # touches network
      "test_connect_wrapper"
      # time dependent and flaky
      "test_transfer_monitor_callbacks"
    ];
  
    meta = with lib; {
      description = "A Python Matrix client library, designed according to sans I/O principles";
  