{
  inputs.nixpkgs.url = "github:NixOS/nixpkgs?ref=nixos-unstable";

  outputs = {nixpkgs, ...}: let
    systems = ["x86_64-linux" "aarch64-linux"];
    forAllSystems = nixpkgs.lib.genAttrs systems;
    pkgsFor = system: nixpkgs.legacyPackages.${system};
  in {
    devShells = forAllSystems (system: let
      pkgs = pkgsFor system;
    in {
      default = pkgs.mkShell {
        name = "nixir";
        buildInputs = with pkgs; let
          nixForLinking = nixVersions.nixComponents_2_32;
        in [
          boost.dev
          libblake3.dev
          pegtl

          nixForLinking.nix-store
          nixForLinking.nix-expr
          nixForLinking.nix-cmd
          nixForLinking.nix-fetchers
          nixForLinking.nix-main
          nixForLinking.nix-util
        ];

        nativeBuildInputs = with pkgs; [
          cmake
          pkg-config
          ninja
          bear
          clang-tools
          just
          entr
        ];

        env.NIX_PLUGINABI = "0.2";
      };
    });

    formatter = forAllSystems (system: let
      pkgs = pkgsFor system;
    in
      pkgs.writeShellApplication {
        name = "nix3-fmt-wrapper";

        runtimeInputs = [
          pkgs.alejandra
          pkgs.fd
        ];

        text = ''
          fd "$@" -t f -e nix -x alejandra -q '{}'
        '';
      });
  };
}