Shell nix empty structure

shell.nix

{ pkgs ? import <nixpkgs> {} }:
# { pkgs ? import (fetchTarball "https://github.com/NixOS/nixpkgs/archive/nixos-23.11.tar.gz") {} }:

with pkgs;

mkShell {
    nativeBuildInputs = [
        
    ];

    buildInputs = [

    ];
}

# https://discourse.nixos.org/t/pkg-config-cant-find-gobject/38519/3