-# Use `python -m pip` to ensure we are using the latest version of pip
-python -m pip install --user --quiet --upgrade pip
-python -m pip install --user --quiet --upgrade setuptools
-python -m pip install --user --quiet --upgrade -r "$REQUIREMENTS_FILE"
-pip freeze
+ # Use `python -m pip` to upgrade to the latest pip into user site-packages
+ python3 -m pip install --user --quiet --upgrade pip
+ python3 -m pip install --user --quiet --no-warn-script-location --upgrade setuptools
+ python3 -m pip install --user --quiet --no-warn-script-location --upgrade --upgrade-strategy eager -r "$requirements_file"
+ # installs are silent, show version details in log
+ python3 --version
+ python3 -m pip --version
+ python3 -m pip freeze
+ rm -rf "$requirements_file"
+ touch /tmp/pre-build-complete
+fi