user@host:~$ python3 -m venv env
user@host:~$ . env/bin/activate
(env) user@host:~$ pip --version
pip 7.1.2 from /volume1/homes/user/env/lib/python3.5/site-packages (python 3.5)
user@host:~$ pip install --upgrade pip
...
Successfully installed pip-18.0