diff --git a/root.bp b/root.bp
index 31a95fd4d..d91da6456 100644
--- a/root.bp
+++ b/root.bp
@@ -36,5 +36,6 @@ optional_subdirs = [
     "system/tools/*",
     "test/vts",
     "test/vts-testcase/*",
+    "tools/*",
     "vendor/*/*",
 ]