+PYTHON_VERSION=$(shell $(PYTHON_INTERP) -c 'import sys; print(sys.version_info.major)')
+PIP_TOOLS_VERSION=3.8.0 # Keep in sync with requirements.txt
+PYTHON_DEPENDS=requirements-$(PYTHON_VERSION).txt
+SCAPY_SOURCE=$(shell find $(VENV_PATH)/lib/$(PYTHON_INTERP) -name site-packages)
+BUILD_COV_DIR=$(TEST_DIR)/coverage
+
+PIP_TOOLS_INSTALL_DONE=$(TEST_RUN_DIR)/pip-tools-install-$(PYTHON_VERSION).done
+PIP_INSTALL_DONE=$(TEST_RUN_DIR)/pip-install-$(PYTHON_VERSION).done
+PIP_PATCH_DONE=$(TEST_RUN_DIR)/pip-patch-$(PYTHON_VERSION).done
+PAPI_INSTALL_DONE=$(TEST_RUN_DIR)/papi-install-$(PYTHON_VERSION).done
+
+PAPI_INSTALL_FLAGS=$(PIP_INSTALL_DONE) $(PIP_PATCH_DONE) $(PAPI_INSTALL_DONE)
+
+$(PIP_TOOLS_INSTALL_DONE):
+ @rm -rf $(VENV_PATH)