`bench install` command

There appears to be a bench install command that helps you install bench dependencies. But I can’t figure out its arguments, and there doesn’t appear to be any online documentation regarding install, what are its [OPTIONS] and [ARGS]?

$ sudo bench install
sudo: unable to resolve host ubuntu
Usage: bench install [OPTIONS] COMMAND [ARGS]...

  Install system dependancies

Options:
  --help  Show this message and exit.

Commands:
  fail2ban
  mariadb
  nginx
  nodejs
  packer
  prerequisites
  psutil
  supervisor
  virtualbox
  wkhtmltopdf