Don't use the removed --no-site-packages flag to virtualenv

Author: blag

Makefile

@@ -89,7 +89,7 @@ $(VIRTUALENV_DIR)/bin/activate:
 	@echo
 	@echo "==================== virtualenv ===================="
 	@echo
-	test -d $(VIRTUALENV_DIR) || virtualenv --no-site-packages $(VIRTUALENV_DIR)
+	test -d $(VIRTUALENV_DIR) || virtualenv $(VIRTUALENV_DIR)
 
 	# Setup PYTHONPATH in bash activate script...
 	echo '' >> $(VIRTUALENV_DIR)/bin/activate