{ description = "TS environment"; inputs = { nixpkgs.url = "github:nixos/nixpkgs/nixos-unstable"; }; outputs = { self, nixpkgs }: let # Helper to provide system-specific attributes forAllSupportedSystems = f: nixpkgs.lib.genAttrs supportedSystems (system: f { pkgs = import nixpkgs { inherit system; }; }); supportedSystems = [ "x86_64-linux" ]; in { devShells = forAllSupportedSystems ({ pkgs }: { default = pkgs.mkShell { packages = with pkgs; [ typescript nodejs_21 nodePackages_latest.pnpm ]; }; }); }; }