anchor.diff:        pycrypto
         requests2
         six
  +    ] ++ optionals (pythonOlder "3.4") [
  +      enum34
       ];
   
       meta = {
  
positive.code: 
      propagatedBuildInputs = with self; [
        cffi
        enum34
        idna
        ipaddress
        pyasn1
      ];
  
    };
  
negative.code:       md5 = "caba1ce15d312bf68d65a5d2cf9ccff2";
      };
  
      deps =
        if !isPy3k then [
          self.pies2overrides
        ] else [ ];
  
      propagatedBuildInputs = deps ++ optionals (pythonOlder "3.4") [
        self.enum34
      ];
  
      meta = {
        description = "The simplest way to write one program that runs on both Python 2 and Python 3";
  