diff --git a/python_env.mk b/python_env.mk
index fb9309cdc54f48275de4046fe440632cbda617c3..84f35f957df62d84b19ff8645964ddac317683cc 100644
--- a/python_env.mk
+++ b/python_env.mk
@@ -1,3 +1,7 @@
+ifndef ENV_FOLDER
+ENV_FOLDER = $(shell pwd)/.venv
+endif
+
 .env:
 ifeq ($(shell python -c 'import sys; print(sys.version_info[0:2])'),(2, 7))
 	@echo "--> Installing environment to $(ENV_FOLDER)"