1 files changed, 2 insertions, 0 deletions
diff --git a/Makerules b/Makerules
index c62d012daf..ae9114b0f1 100644
--- a/Makerules
+++ b/Makerules
@@ -459,6 +459,8 @@ endif
 
 # Maximize efficiency by minimizing the number of rules.
 .SUFFIXES:	# Clear the suffix list.  We don't use suffix rules.
+# Don't define any builtin rules.
+MAKEFLAGS := $(MAKEFLAGS)r
 
 # Generic rule for making directories.
 %/: