1  {
 2    inputs = {
 3      nixpkgs.url = "github:NixOS/nixpkgs/nixpkgs-unstable";
 4      flake-utils.url = "github:numtide/flake-utils";
 5    };
 6  
 7    outputs = { self, nixpkgs, flake-utils }:
 8      flake-utils.lib.eachDefaultSystem
 9        (system:
10          let
11            pkgs = import nixpkgs {
12              inherit system;
13            };
14          in {
15            devShells.default = pkgs.mkShell {
16              buildInputs = [
17                pkgs.nodejs
18              ];
19            };
20          }
21        );
22  }