diff --git a/packages/zone.js/dist/tools.bzl b/packages/zone.js/dist/tools.bzl
index 5c2d0bc2bb..ec22b2e776 100644
--- a/packages/zone.js/dist/tools.bzl
+++ b/packages/zone.js/dist/tools.bzl
@@ -8,6 +8,7 @@ def zone_rollup_bundle(config_file, bundles):
             name = b[0] + "-rollup",
             config_file = config_file,
             entry_point = b[1] + ".ts",
+            silent = True,
             sourcemap = "false",
             deps = [
                 "//packages/zone.js/lib",