anchor.diff:      openpyxl
       tables
       xlwt
  -  ] ++ optional isDarwin darwin.locale; # provides the locale command
  +  ];
   
     # For OSX, we need to add a dependency on libcxx, which provides
     # `complex.h` and other libraries that pandas depends on to build.
  
positive.code:     homepage = "http://pandas.pydata.org/";
      description = "Python Data Analysis Library";
      license = stdenv.lib.licenses.bsd3;
      maintainers = with stdenv.lib.maintainers; [ raskin fridh ];
      platforms = stdenv.lib.platforms.unix;
    };
  }
  
negative.code: , openpyxl
  , tables
  , xlwt
  , libcxx ? null
  }:
  
  