diff --git a/Makefile.in b/Makefile.in
index c3682c13..74461e40 100755
--- a/Makefile.in
+++ b/Makefile.in
@@ -371,7 +371,7 @@ yum-packages-python:
 	for x in rpm-packages-python.txt rpm-packages-python-dev.txt; do \
 		find . -maxdepth 3 -path "*/setup/$$x"; \
 	done | xargs "$(BASH_TOOLS)/yum_install_packages.sh"
-	. $(BASH_TOOLS)/lib/python.sh; \
+	. "$(BASH_TOOLS)/lib/python.sh"; \
 	if ! inside_virtualenv; then \
 		for x in rpm-packages-pip.txt; do \
 			find . -maxdepth 3 -path "*/setup/$$x"; \