Unable to install from PIP

[derks]

(boss-py3)derks-mac [boss] $ pip install boss
Downloading/unpacking boss
  Downloading boss-0.9.16.tar.gz
  Running setup.py (path:/Users/derks/.env/boss-py3/build/boss/setup.py) egg_info for package boss
    Traceback (most recent call last):
      File "<string>", line 17, in <module>
      File "/Users/derks/.env/boss-py3/build/boss/setup.py", line 4, in <module>
        from cement.utils import version
    ImportError: No module named 'cement'
    Complete output from command python setup.py egg_info:
    Traceback (most recent call last):

  File "<string>", line 17, in <module>
pyYaml

  File "/Users/derks/.env/boss-py3/build/boss/setup.py", line 4, in <module>

    from cement.utils import version



ImportError: No module named 'cement'