“error: screenkey: Is a directory” when installing in Mac OS X

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Is anybody install successfully in MacOS?
When I execute the "sudo ./setup.py install" command to install from source code, I met an "error: screenkey: Is a directory“ . Here is the installation trace log, the version I am using is screenkey-0.2.

$ sudo ./setup.py install
running install
running build
running build_py
creating build
creating build/lib
creating build/lib/Screenkey
copying Screenkey/__init__.py -> build/lib/Screenkey
copying Screenkey/listenkdb.py -> build/lib/Screenkey
copying Screenkey/modmap.py -> build/lib/Screenkey
copying Screenkey/screenkey.py -> build/lib/Screenkey
running build_scripts
creating build/scripts-2.7
error: screenkey: Is a directory