Pipenv: CLI rusak dengan v6.2.1 di mac saya sekarang

pipenv install --tiga
Sabtu 9 Sep 23:02:15 2017
Traceback (panggilan terakhir terakhir):
File "/Users/erin/.local/bin/pipenv", baris 7, dalam
dari pipenv import cli
File "/Users/erin/.local/venvs/pipenv/lib/python2.7/site-packages/pipenv/__init__.py", baris 13, di
dari .cli import cli
File "/Users/erin/.local/venvs/pipenv/lib/python2.7/site-packages/pipenv/cli.py", baris 82, di
proyek = Proyek ()
File "/Users/erin/.local/venvs/pipenv/lib/python2.7/site-packages/pipenv/project.py", baris 33, di __init__
os.chdir (self.project_directory)
File "/Users/erin/.local/venvs/pipenv/lib/python2.7/site-packages/pipenv/project.py", baris 49, di project_directory
kembali os.path.abspath (os.path.join (self.pipfile_location, os.pardir))
File "/Users/erin/.local/venvs/pipenv/bin/../lib/python2.7/posixpath.py", baris 70, di gabung
elif path == '' atau path.endswith ('/'):
AttributeError: Objek 'NoneType' tidak memiliki atribut 'endswith'