diff --git a/engine/src/flutter/.ci.yaml b/engine/src/flutter/.ci.yaml
index d8063504f6..9e6bed7c4f 100644
--- a/engine/src/flutter/.ci.yaml
+++ b/engine/src/flutter/.ci.yaml
@@ -192,6 +192,7 @@ targets:
     recipe: engine/engine_unopt
     properties:
       add_recipes_cq: "true"
+      clobber: "true"
     timeout: 60
     scheduler: luci