Try using older version of pip.
@@ -254,7 +254,7 @@ requirements: virtualenv .sdist-requirements
@echo "==================== requirements ===================="
@echo
# Make sure we use latest version of pip
- $(VIRTUALENV_DIR)/bin/pip install --upgrade "pip>=9.0,<9.1"
+ $(VIRTUALENV_DIR)/bin/pip install --upgrade "pip>=9.0,<9.0.2"
$(VIRTUALENV_DIR)/bin/pip install virtualenv # Required for packs.install in dev envs.
# Generate all requirements to support current CI pipeline.
