{ pkgs, config, lib, ... }:
{
  config = {
  systemd.services.custom-install = {
    description = "Custom installation script";
    wantedBy = [ "multi-user.target" ];
    after = [ "network.target" ];
    path = [ pkgs.util-linux pkgs.parted pkgs.nixos-install-tools pkgs.nixos-anywhere pkgs.disko ];
    preStart = "/bin/sleep 60";
    serviceConfig = {
      Type = "oneshot";
      RemainAfterExit = true;
    };

    script = ''
      # Your installation commands here
      if [ ! -f /etc/installation-completed ]; then
        # Run your installation steps
        "${config.myPackages.installFiles}/bin/install.sh"
        # Mark as completed
        touch /etc/installation-completed
      fi
    '';
  };
  };
}