diff --git a/flutter.sh b/flutter.sh
index d0cc869..6e13bf1 100755
--- a/flutter.sh
+++ b/flutter.sh
@@ -4,6 +4,13 @@
 DEST_DIR="${TUNASYNC_WORKING_DIR}"
 SYNC_FLUTTER_ENGINES=latest_tags
 
+mkdir -p "${DEST_DIR}/download.flutter.io" \
+    "${DEST_DIR}/dart-archive/channels/stable/release" \
+    "${DEST_DIR}/flutter_infra/releases" \
+    2>/dev/null || true
+
+gsutil rsync -d -C -r gs://download.flutter.io/ \
+    "${DEST_DIR}/download.flutter.io"
 gsutil rsync -d -C -r -x '(1\..+/|\d{5}/|.+/api-docs)' gs://dart-archive/channels/stable/release \
     "${DEST_DIR}/dart-archive/channels/stable/release"
 gsutil rsync -d -C -r -x '(dev|beta)' gs://flutter_infra/releases \