feat(configuration.nix): use Lix as the system Nix distribution - #69
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Set nix.package to pkgs.lix so the daemon, nixos-rebuild, and the nix CLI run Lix instead of upstream CppNix. Lix comes from the already-pinned nixpkgs (2.93.4), so this needs no new flake input or from-source build.
phorcys420
marked this pull request as ready for review
August 24, 2026 22:38
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Switch The Box from upstream CppNix to Lix as the system Nix distribution.
What
Added next to the existing
nix.settingsblock inconfiguration.nix.pkgs.lix(2.93.4) comes from the already-pinned nixpkgs 25.11, so the daemon,nixos-rebuild, and thenixCLI all run Lix. No new flake input, noflake.lockchurn, no from-source build.Validation
Evaluated with Lix locally:
nixosConfigurations.*.config.nix.package->lix 2.93.4make check(flake eval, all systems) - passmake fmt/check+make lint- clean (0 changed)Scope note
This swaps the system Nix. It does not overlay nixpkgs, so packages that reference
pkgs.nixin their closure still pull CppNix. If a full distribution swap is wanted, the follow-up options are:lix-project/nixos-module(nixosModules.lixFromNixpkgsto avoid source builds), ornixpkgs.overlays = [ (f: p: { nix = p.lix; }) ]Happy to switch to either if preferred.
Decision log
pkgs.lix= 2.93.4, so no extra input or source build is needed.nix.package = pkgs.lixover the official NixOS module because it is the smallest correct change, matches the box's reproducibility posture (everything from the pinned nixpkgs), and avoids ballooning ISO build times with a from-source Lix.pkgs.nixconsumers stay on CppNix. The module/overlay alternatives (noted above) cover that if desired.Opened by Coder Agents on behalf of @phorcys420.