[anneal] Keep vendored Lake inputs older than archive caches#3443
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This was referenced Jun 7, 2026
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## main #3443 +/- ##
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The installed Nix-built toolchain archive is read-only, and generated verification workspaces symlink vendored .lake/build directories back into that archive to avoid copying several GiB of prebuilt Lean artifacts per run. Normalize copied vendored Lake source/config mtimes to the Unix epoch so Lake --old treats the linked archive cache artifacts as reusable instead of trying to delete and rebuild read-only .olean files through those symlinks. gherrit-pr-id: Gqbvdpe5hujures6czytfxm2bfeoeddlx
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The installed Nix-built toolchain archive is read-only, and generated verification workspaces symlink vendored .lake/build directories back into that archive to avoid copying several GiB of prebuilt Lean artifacts per run.
Normalize copied vendored Lake source/config mtimes to the Unix epoch so Lake --old treats the linked archive cache artifacts as reusable instead of trying to delete and rebuild read-only .olean files through those symlinks.
Latest Update: v2 — Compare vs v1
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git fetch origin refs/heads/Gqbvdpe5hujures6czytfxm2bfeoeddlx && git checkout -b pr-Gqbvdpe5hujures6czytfxm2bfeoeddlx FETCH_HEADCheckout
git fetch origin refs/heads/Gqbvdpe5hujures6czytfxm2bfeoeddlx && git checkout FETCH_HEADCherry Pick
git fetch origin refs/heads/Gqbvdpe5hujures6czytfxm2bfeoeddlx && git cherry-pick FETCH_HEADPull
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