diff --git a/core/main.mk b/core/main.mk
index f0ef602087..3de1b20097 100644
--- a/core/main.mk
+++ b/core/main.mk
@@ -399,6 +399,7 @@ subdirs += \
 	sdk/layoutlib_utils \
 	sdk/ninepatch \
 	sdk/sdkstats \
+	sdk/builders \
 	sdk/sdkmanager \
 	sdk/layoutopt \
 	development/apps \