My laptop system configuration

configuration.nix

{ config, pkgs, ... }:

{
  imports =
    [
      ./hardware-configuration.nix
    ];

  boot = {
    kernelPackages = pkgs.linuxPackages_latest;
    extraModulePackages = [ config.boot.kernelPackages.exfat-nofuse ];
    cleanTmpDir = true;
    loader = {
      systemd-boot.enable = true;
      efi.canTouchEfiVariables = true;
    };
  };

  networking = {
    hostName = "horus";
    networkmanager.enable = true;
    useDHCP = false;
    interfaces.wlo1.useDHCP = true;
  };

  # tty layout
  i18n = {
     consoleFont = "Lat2-Terminus16";
     consoleKeyMap = "fr";
     defaultLocale = "fr_FR.UTF-8";
  };

  time.timeZone = "Europe/Paris";

  environment.systemPackages = with pkgs; [
    wget vim git
  ];

  fonts.fonts = with pkgs; [
    nerdfonts
  ];

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

  # Optimize battery
  services.tlp.enable = true;

  # Enable sound.
  sound.enable = true;
  hardware.pulseaudio.enable = true;

  # Allows to edit brightness
  hardware.brightnessctl.enable = true;

  programs = {
    zsh = {
      enable = true;
      interactiveShellInit = ''
        export ZSH=${pkgs.oh-my-zsh}/share/oh-my-zsh/

        # oh-my-zsh options
        ZSH_THEME="agnoster"
        plugins=(git)

        source $ZSH/oh-my-zsh.sh
      '';
     promptInit = ""; # Clear this to avoid conflict with omz
    };
  };

  # Enable the X11 windowing system.
  services.xserver = {
    enable = true;
    layout = "fr";
    xkbOptions = "eurosign:e";

    # Enable touchpad support.
    libinput.enable = true;

    # Enable lightdm
    displayManager.lightdm.enable = true;
  };   

  # Define a user account. Don't forget to set a password with ‘passwd’.
  users.users.thomas = {
     isNormalUser = true;
     extraGroups = [ "wheel" "networkmanager" "video" ];
  };

  system.stateVersion = "19.09";

}