virtualenv --quiet -p "$PYTHON_VERSION" "/tmp/v/tox"
# shellcheck source=/tmp/v/tox/bin/activate disable=SC1091
source "/tmp/v/tox/bin/activate"
-pip install --quiet --upgrade pip
-pip install --quiet --upgrade pipdeptree
-pip install --quiet --upgrade argparse detox tox tox-pyenv
+pip install --quiet --upgrade "pip==9.0.3" setuptools
+pip install --quiet --upgrade argparse detox "tox<3.0.0" tox-pyenv
-echo "----> Pip Dependency Tree"
-pipdeptree
+echo "----> pip freeze"
+pip freeze