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Traceback (most recent call last): File "setup.py", line 20, in <module> 'Programming Language :: Python :: 3' File "/Library/Frameworks/Python.framework/Versions/3.7/lib/python3.7/site-packages/setuptools/__init__.py", line 144, in setup return distutils.core.setup(**attrs) File "/Library/Frameworks/Python.framework/Versions/3.7/lib/python3.7/distutils/core.py", line 108, in setup _setup_distribution = dist = klass(attrs) File "/Library/Frameworks/Python.framework/Versions/3.7/lib/python3.7/site-packages/setuptools/dist.py", line 426, in __init__ k: v for k, v in attrs.items() File "/Library/Frameworks/Python.framework/Versions/3.7/lib/python3.7/distutils/dist.py", line 267, in __init__ getattr(self.metadata, "set_" + key)(val) File "/Library/Frameworks/Python.framework/Versions/3.7/lib/python3.7/distutils/dist.py", line 1227, in set_requires distutils.versionpredicate.VersionPredicate(v) File "/Library/Frameworks/Python.framework/Versions/3.7/lib/python3.7/distutils/versionpredicate.py", line 114, in __init__ raise ValueError("expected parenthesized list: %r" % paren) ValueError: expected parenthesized list: '-core' According to https://stackoverflow.com/questions/16127080/setup-py-expected-parenthesized-list-when-required-package-name-contains-a-dash In file setup.py , change "requires" to "install_requires" and then everything is good.