NixOS Configuration CI / Nix Flake Check (pull_request) Failing after 3h7m5s
yarr needs rustc 1.97.1 but the main nixpkgs input (pinned by flake.lock) has rustc 1.95.0. Bumping the main input breaks aioimaplib (email server dep), so add a separate rust-nixpkgs input pinned to a newer rev. yarr is excluded from the overlay (which uses the main nixpkgs) — build it via 'nix build .#yarr' on the flake directly.