neilpquinn-wmf@notebook1003:~$ pip install nbdime
Collecting nbdime
  Using cached https://files.pythonhosted.org/packages/0f/3f/668922f04fa6848437d8486c495ceea2fbe2b011e1084cb49a792c4bec31/nbdime-1.1.0-py2.py3-none-any.whl
Requirement already satisfied: nbformat in ./venv/lib/python3.5/site-packages (from nbdime) (4.4.0)
Collecting GitPython!=2.1.4,!=2.1.5,!=2.1.6 (from nbdime)
  Using cached https://files.pythonhosted.org/packages/8e/c7/70bd352e8a561a9b6d1cde9aa313b9d7c871b0c94c3821f44c01f3187e1d/GitPython-3.0.2-py3-none-any.whl
Requirement already satisfied: six in ./venv/lib/python3.5/site-packages (from nbdime) (1.11.0)
Collecting colorama (from nbdime)
  Using cached https://files.pythonhosted.org/packages/4f/a6/728666f39bfff1719fc94c481890b2106837da9318031f71a8424b662e12/colorama-0.4.1-py2.py3-none-any.whl
Requirement already satisfied: notebook in ./venv/lib/python3.5/site-packages (from nbdime) (5.7.8)
Requirement already satisfied: requests in ./venv/lib/python3.5/site-packages (from nbdime) (2.19.1)
Requirement already satisfied: jinja2>=2.9 in ./venv/lib/python3.5/site-packages (from nbdime) (2.10)
Requirement already satisfied: tornado in ./venv/lib/python3.5/site-packages (from nbdime) (6.0.3)
WARNING: No metadata found in ./venv/lib/python3.5/site-packages
ERROR: Could not install packages due to an EnvironmentError: [Errno 2] No such file or directory: '/srv/home/neilpquinn-wmf/venv/lib/python3.5/site-packages/tornado-6.0.3.dist-info/METADATA'