diff --git a/debian/rules b/debian/rules
index e281dd566..1be2077f7 100755
--- a/debian/rules
+++ b/debian/rules
@@ -11,6 +11,8 @@ include debian/rules.defs
 
 stamp = [ -d $(dir $@) ] || mkdir $(dir $@); touch $@
 
+.NOTPARALLEL:
+
 source: debian/control $(STAMPS_DIR)/source-base
 $(STAMPS_DIR)/source-base:
 	dh_testdir