anchor.diff:    inherit (stdenv.lib)
       optionals;
   
  -  version = "1.7.2";
  +  version = "1.8.1";
   in
   buildPythonPackage {
     name = "cryptography-${version}";
  
positive.code:   ];
  
    propagatedBuildInputs = [
      cffi
      idna
      ipaddress
      pyasn1
    ] ++ optionals (pythonOlder "3.4") [
      enum34
    ];
  
negative.code: , lib
  , pythonOlder
  
  , asn1crypto
  , cffi
  , enum34
  , idna
  , ipaddress
  , openssl
  , packaging
  , six
  }:
  
  