3e0782c62a
Mathlib's post-update hook fetched the cache inside 'lake update', where a few dropped transfers failed the build before the retries could run. Disable the hook, retry up to six times, and keep the archives in a BuildKit cache mount so a retried image build resumes. Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_01FYqwNMyPUHeTbFWg83GQq6