Here's an example:

https://ci.chromium.org/ui/p/flutter/builders/prod/Linux%20linux_fuchsia/1238/overview

In the last day or so this has flaked many many times, resulting in sporadic engine tree closures. When the upload fails, the top-level retry performs the entire build again, wasting resources.

cc @keyonghan infra gardener
fyi @matanlurey engine sheriff.