Block sleep and screen locking in configuration.nix

[cjo]

Dear all, I use a nixos with kde/plasma and wayland. My users should bother with very few things, so e.g. not with unlocking a screen after a break and typing some password. Best thing is to enable the tick box “Manually block sleep and screen locking” that can be found in the energy/brightness (click on battery symbol). However, I do not want to check that check box after each reboot. How can I include this setting in my configuration.nix? Here is my configuration.nix I use.
Regards, cjo

# Edit this configuration file to define what should be installed on
# your system.  Help is available in the configuration.nix(5) man page
# and in the NixOS manual (accessible by running ‘nixos-help’).

{ config, pkgs, ... }:
let
  number = "11";
  hostname = "bla${number}";
  user = "user${number}";
  workspace_uid = "F1F3-7325"; # sudo blkid
in {
  imports =
    [ # Include the results of the hardware scan.
      ./hardware-configuration.nix
    ];

  # Bootloader.
  boot.loader.systemd-boot.enable = true;
  boot.loader.efi.canTouchEfiVariables = true;

  networking.wireless = {
    enable = true;  # Enables wireless support via wpa_supplicant.
    userControlled.enable = false;
    networks."MyNetwork" = {
      hidden = true;
      auth = ''
key_mgmt=WPA-PSK
psk="somePassword"
'';
    };
  };


  systemd.services = {
    media-perm-updater = {
      script = "mkdir /run/media -p && chown root /run/media && chmod 700 /run/media";
      wantedBy = ["default.target"];
    };
  };

  # Configure network proxy if necessary
  # networking.proxy.default = "http://user:password@proxy:port/";
  # networking.proxy.noProxy = "127.0.0.1,localhost,internal.domain";

#  networking.interfaces.wlp8s0.ipv4.addresses = [ {
#    address = "192.168.42.${number}";
#    prefixLength = 24;
#  } ];

  # Enable networking
#  networking.networkmanager.enable = true;

  # Set your time zone.
  time.timeZone = "Europe/Berlin";

  # Select internationalisation properties.
  i18n.defaultLocale = "en_US.UTF-8";

  i18n.extraLocaleSettings = {
    LC_ADDRESS = "de_DE.UTF-8";
    LC_IDENTIFICATION = "de_DE.UTF-8";
    LC_MEASUREMENT = "de_DE.UTF-8";
    LC_MONETARY = "de_DE.UTF-8";
    LC_NAME = "de_DE.UTF-8";
    LC_NUMERIC = "de_DE.UTF-8";
    LC_PAPER = "de_DE.UTF-8";
    LC_TELEPHONE = "de_DE.UTF-8";
    LC_TIME = "de_DE.UTF-8";
  };

  # Enable the X11 windowing system.
  services.xserver.enable = true;

  # Enable the KDE Plasma Desktop Environment.
  services.xserver.displayManager.sddm.enable = true;
  services.xserver.desktopManager.plasma5.enable = true;

  # Configure keymap in X11
  services.xserver = {
    layout = "de";
    xkbVariant = "";
  };

  # Configure console keymap
  console.keyMap = "de";

  # Enable CUPS to print documents.
  services.printing.enable = true;

  # Enable sound with pipewire.
  sound.enable = true;
  hardware.pulseaudio.enable = false;
  security.rtkit.enable = true;
  services.pipewire = {
    enable = true;
    alsa.enable = true;
    alsa.support32Bit = true;
    pulse.enable = true;
    # If you want to use JACK applications, uncomment this
    #jack.enable = true;

    # use the example session manager (no others are packaged yet so this is enabled by default,
    # no need to redefine it in your config for now)
    #media-session.enable = true;
  };

  # Enable touchpad support (enabled default in most desktopManager).
  # services.xserver.libinput.enable = true;

  # Define a user account. Don't forget to set a password with ‘passwd’.
  fileSystems."/home/${user}/eclipse-workspace" = {
    device = "/dev/disk/by-uuid/${workspace_uid}";
    fsType = "vfat";
    options = [ "rw" "users" "uid=1000"];
  };

  users.users."${user}" = {
    isNormalUser = true;
    password = "studienkolleg";
    uid = 1000;
    description = user;
    extraGroups = [ ];
    packages = [
      (pkgs.makeAutostartItem {name = "Eclipse"; package = pkgs.eclipses.eclipse-java; })
    ];
  };

  users.users.admin = {
    isNormalUser = true;
    description = "admin";
    extraGroups = [ "networkmanager" "wheel" ];
    packages = with pkgs; [
    #  thunderbird
    ];
  };

  # Enable automatic login for the user.
  services.xserver.displayManager.autoLogin.enable = true;
  services.xserver.displayManager.autoLogin.user = user;

  # Allow unfree packages
  nixpkgs.config.allowUnfree = true;

  # List packages installed in system profile. To search, run:
  # $ nix search wget
  environment.systemPackages = with pkgs; [
  #  vim # Do not forget to add an editor to edit configuration.nix! The Nano editor is also installed by default.
  #  wget
    eclipses.eclipse-java
    jdk17
    kate
    firefox
  ];

  # Some programs need SUID wrappers, can be configured further or are
  # started in user sessions.
  # programs.mtr.enable = true;
  # programs.gnupg.agent = {
  #   enable = true;
  #   enableSSHSupport = true;
  # };
  networking.hostName = hostname;
  # List services that you want to enable:

  # Enable the OpenSSH daemon.
  # services.openssh.enable = true;

  # Open ports in the firewall.
  # networking.firewall.allowedTCPPorts = [ ... ];
  # networking.firewall.allowedUDPPorts = [ ... ];
  # Or disable the firewall altogether.
  networking.firewall.enable = false;

  networking.firewall.allowPing = true;

  # This value determines the NixOS release from which the default
  # settings for stateful data, like file locations and database versions
  # on your system were taken. It‘s perfectly fine and recommended to leave
  # this value at the release version of the first install of this system.
  # Before changing this value read the documentation for this option
  # (e.g. man configuration.nix or on https://nixos.org/nixos/options.html).
  system.stateVersion = "23.11"; # Did you read the comment?
  boot.tmp.cleanOnBoot = true;
}