"That's the neat part... You don't!" - Omni-man
Pavilion is meant to be used straight out of either a checked out version of it's repository, or from an extracted tarball.
Pavilion will automatically install its dependencies the first time it's run.
When running from a git clone of the repo, it will clone appropriate versions of its
dependencies into the lib/ directory.
When running from a tarball, Pavilion will establish a Python virtual environment for you, and pip install the dependencies there.
In either case, you will need access to the internet for these install methods to work. This includes setting your proxy settings ('http_proxy', 'https_proxy').
You can also install the dependencies at the system level. Pavilion will check if it can be run without installing dependencies before auto-installing anything.