anchor.diff:  , pytest-benchmark
   , sortedcollections
   , sortedcontainers
  -, isPy3k
  +, pythonOlder
   }:
   
   buildPythonPackage rec {
     pname = "bidict";
  -  version = "0.21.2";
  -  disabled = !isPy3k;
  +  version = "0.21.3";
  +
  +  disabled = pythonOlder "3.7";
   
     src = fetchPypi {
       inherit pname version;
  -    sha256 = "4fa46f7ff96dc244abfc437383d987404ae861df797e2fd5b190e233c302be09";
  +    sha256 = "sha256-1QvYH65140GY/8lJeaDrCTn/mts+8yvMk6kT2LPj7R0=";
     };
   
  -  nativeBuildInputs = [ setuptools-scm ];
  -  propagatedBuildInputs = [ sphinx ];
  +  propagatedBuildInputs = [
  +    sphinx
  +  ];
   
     checkInputs = [
       hypothesis
  
positive.code: { lib, buildPythonPackage, fetchPypi
  , setuptools-scm
  , sphinx
  , hypothesis
  , py
  
negative.code:     sortedcontainers
    ];
  
    pythonImportsCheck = [ "bidict" ];
  
    meta = with lib; {
      homepage = "https://github.com/jab/bidict";
      description = "Efficient, Pythonic bidirectional map data structures and related functionality";
  