Fontparts setup.py won't run.

Mac 10.13.5:  I have tried running the setup.py script for Fontparts several times and in different ways (sudo, build, python + build, etc.) and it always fails saying there is no README.rst file even though there is. Any suggestions as to what I am doing wrong?

Traceback (most recent call last):

  File "/Applications/FontTools/fontParts-master/setup.py", line 138, in <module>

    with open('README.rst', 'r') as f:

IOError: [Errno 2] No such file or directory: 'README.rst'