{ pkgs, config, lib, installFiles, ... }:
{
  config = {
  systemd.services.custom-install = {
    description = "Custom installation script";
    wantedBy = [ "multi-user.target" ];
    after = [ "network.target" ];
    path = [ pkgs.coreutils ];
    preStart = "/run/current-system/sw/bin/sleep 4";
    serviceConfig = {
      Type = "oneshot";
      RemainAfterExit = true;
      TTYPath = /dev/tty1;  # or whichever TTY you want to use
      StandardOutput = "tty";
      StandardError = "tty";
    };
    
    script = ''
    mkdir /home/nixos/installer
    cp -R ${config.myPackages.installFiles}/ /home/nixos/installer
    ln
    
    cat > output.txt <<EOF
    some text
    some lines
    EOF
    '';

    ## Old install script
    #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
    #'';
  };
  };
}