anchor.diff:  , requests
   , scikitimage
   , six
  -, pytest
  +, pytestCheckHook
   , isPy27
   , tifffile
   }:
  
positive.code: { lib
  , buildPythonPackage
  , fetchPypi
  , boto3
  , diskcache
  , enum34
  
negative.code:   pname = "slicedimage";
    version = "4.1.1";
  
    src = fetchFromGitHub {
      owner = "spacetx";
      repo = pname;
      rev = version;
      sha256 = "1vpg8varvfx0nj6xscdfm7m118hzsfz7qfzn28r9rsfvrhr0dlcw";
    };
  
    propagatedBuildInputs = [
  