-pip install --user --quiet --upgrade pip==18.0 setuptools==40.0.0
-pip install --user --quiet --upgrade -r "$REQUIREMENTS_FILE"
+# Use `python -m pip` to ensure we are using the latest version of pip
+python -m pip install --user --quiet --upgrade pip
+python -m pip install --user --quiet --upgrade setuptools
+python -m pip install --user --quiet --upgrade -r "$REQUIREMENTS_FILE"