chore(nix): pin nixpkgs to 20b1ddd1 - #3
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The unstable input now pins nixpkgs 20b1ddd1aa5ace70c9468305030aa4f9ef79671b. The previous lock held ebc08544afa77957cc348ba72dc490ec73b87f68. The host NixOS flake uses the same revision as its nixpkgs-unstable input. The dev shell now reuses store paths that the host and other projects already hold. The flake input keeps the name unstable. Only the unstable node changed in flake.lock.
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Summary
This PR pins the
unstableflake input to one exact nixpkgs revision.ebc08544afa77957cc348ba72dc490ec73b87f68(2026-04-29, vianixpkgs-unstable)20b1ddd1aa5ace70c9468305030aa4f9ef79671b(2026-09-19)Why
The projects on this machine pinned 9 different nixpkgs revisions.
Each revision pulls its own copy of glibc, Node.js and other tools into
/nix/store.The root filesystem ran out of space.
The host NixOS flake uses
20b1ddd1as itsnixpkgs-unstableinput.With one shared revision, every dev shell reuses the same store paths.
Changes
flake.nix: theunstableinput URL now names the exact revision instead of thenixpkgs-unstablebranch.flake.lock: only theunstablenode changed.pre-commit-hooksfollows it. No other input moved.Tool versions in the dev shell
ebc08544)20b1ddd1)The "before" versions come from
nix evalagainst the old revision. I did not build the old shell, because that would download a second closure.Verification
nix build .#devShells.x86_64-linux.defaultsucceeded:/nix/store/f6g44p7cgx2mrbsasv0rfkyqkili13gb-nix-shell.nix develop -c bun --versionprinted1.4.2.node --versionprintedv24.20.0.bun install --frozen-lockfileinstalled 7 packages.bun run lint: 0 warnings, 0 errors on 3 files.bun run format: all 8 matched files use the correct format.nix flake check. Its oxlint and oxfmt hooks callbun runinside the Nix sandbox, wherenode_modulesdoes not exist.