+if [[ $PYTHON == "python2" ]]; then
+ $PYTHON -m pip install --user --quiet --upgrade tox tox-pyenv virtualenv more-itertools~=5.0.0
+else
+ $PYTHON -m pip install --user --quiet --upgrade tox tox-pyenv virtualenv
+fi
+
+# installs are silent, show version details in log
+$PYTHON --version
+$PYTHON -m pip --version