Getting a new error on Mac but not on Linux, anyone else seeing this?

11:30:12 00:02       [run]
                     Traceback (most recent call last):
                       File "/Users/amckenna/code/python-commons/.pants.d/test/pytest-prep/CPython-3.8.2/dbace314d7260e4bab850ba0bdd823530b504bb3/.bootstrap/pex/pex.py", line 394, in execute
                         working_set = self._activate()
                       File "/Users/amckenna/code/python-commons/.pants.d/test/pytest-prep/CPython-3.8.2/dbace314d7260e4bab850ba0bdd823530b504bb3/.bootstrap/pex/pex.py", line 92, in _activate
                         for dist in env.activate():
                       File "/Users/amckenna/code/python-commons/.pants.d/test/pytest-prep/CPython-3.8.2/dbace314d7260e4bab850ba0bdd823530b504bb3/.bootstrap/pex/environment.py", line 239, in activate
                         self._working_set = self._activate()
                       File "/Users/amckenna/code/python-commons/.pants.d/test/pytest-prep/CPython-3.8.2/dbace314d7260e4bab850ba0bdd823530b504bb3/.bootstrap/pex/environment.py", line 408, in _activate
                         resolved = self._resolve(working_set, all_reqs)
                       File "/Users/amckenna/code/python-commons/.pants.d/test/pytest-prep/CPython-3.8.2/dbace314d7260e4bab850ba0bdd823530b504bb3/.bootstrap/pex/environment.py", line 290, in _resolve
                         distributions_by_key[distribution.as_requirement().key].append(distribution)
                     AttributeError: 'NoneType' object has no attribute 'as_requirement'