{ lib, config, pkgs, ... }:
let
  script = pkgs.writeShellScriptBin "startScript" ''
    #!${pkgs.bash}/bin/bash
    set -euo pipefail
    TIMESTAMP_FILE="timestamp.txt"
    date +"%Y-%m-%d %H:%M:%S" > "$TIMESTAMP_FILE"
  '';
in
{
  system.activationScripts.startScript = lib.mkIf true {
    text = ''
      ${script}/bin/startScript
    '';
  };
}