{ inputs = { nixpkgs.url = "github:NixOS/nixpkgs/nixpkgs-unstable"; }; outputs = { nixpkgs, ... }: let systems = [ "x86_64-linux" "aarch64-linux" "x86_64-darwin" "aarch64-darwin" ]; forAllSystems = f: nixpkgs.lib.genAttrs systems (system: f nixpkgs.legacyPackages.${system}); in { devShells = forAllSystems (pkgs: { default = pkgs.mkShell { packages = with pkgs; [ nodejs_22 ]; }; }); }; }