virtualenv "/tmp/v/${PIP_PACKAGES%% *}"
# shellcheck source=/tmp/v/venv/bin/activate disable=SC1091
source "/tmp/v/${PIP_PACKAGES%% *}/bin/activate"
-pip install --quiet --upgrade pip setuptools
+pip install --quiet --upgrade "pip==9.0.3" setuptools
pip install --quiet --upgrade pipdeptree
# PIP_PACKAGES needs to be passed through as a space separated list of packages