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Check / eval-and-lint (push) Failing after 1m11s
flake check kept failing on a cold store with "path '…-source' is not valid" while evaluating Stylix's import-from-derivation in the home-manager fontconfig text. Nix keeps flake-input sources in a git cache and only materializes the -source store paths lazily; IFD readFile needs them as real store paths. Works locally only because prior builds already materialized them. Add a `nix flake archive` step that copies every transitive input into the store before the check (and before the eval matrix, which has the same need). Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>