flake.nix

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