{ inputs = { nixpkgs.url = "github:NixOS/nixpkgs/nixpkgs-unstable"; flake-utils.url = "github:numtide/flake-utils"; flake-compat = { url = "github:edolstra/flake-compat"; flake = false; }; }; outputs = { self, nixpkgs, flake-utils, ... }: flake-utils.lib.eachDefaultSystem (system: let pkgs = import nixpkgs {inherit system;}; in { devShells.default = pkgs.mkShell {nativeBuildInputs = with pkgs; [nodejs-16_x yarn];}; }); }