liminalOS/hosts/demeter/default.nix

# 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, inputs, pkgs, lib, ... }:

{
  imports = [ # Include the results of the hardware scan.
    ./hardware-configuration.nix
  ];

  # Bootloader.
  boot.loader = {
    efi.canTouchEfiVariables = true;
    timeout = 15;
    # Lanzaboote currently replaces the systemd-boot module.
    # This setting is usually set to true in configuration.nix
    # generated at installation time. So we force it to false
    # for now.
    systemd-boot = {
      enable = false;
      consoleMode = "auto";
    };
  };

  boot.lanzaboote = {
    enable = true;
    pkiBundle = "/etc/secureboot";
  };

  networking.hostName = "demeter"; # Define your hostname.
  # networking.wireless.enable = true;  # Enables wireless support via wpa_supplicant.

  # select kernel
  boot.kernelPackages = pkgs.linuxPackages_zen;

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

  # Enable networking
  networking.networkmanager.enable = true;

  # Set your time zone.
  time.timeZone = "America/Los_Angeles";

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

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

  systemd.services = { NetworkManager-wait-online.enable = false; };

  # Enable the X11 windowing system.
  # You can disable this if you're only using the Wayland session.
  services.xserver.enable = false;

  programs.nix-ld = {
    enable = true;
    libraries = with pkgs; [ icu xorg.libXtst xorg.libXi ];
  };

  # Enable the KDE Plasma Desktop Environment.
  services.displayManager.sddm = {
    enable = true;
    wayland.enable = true;
    theme = "catppuccin-mocha";
    package = pkgs.kdePackages.sddm;
  };

  hardware.nvidia = {
    modesetting.enable = true;
    powerManagement.enable = true;
    powerManagement.finegrained = false;
    open = false;
    nvidiaSettings = true;
  };

  hardware.graphics.enable = true;

  hardware.nvidia.package = config.boot.kernelPackages.nvidiaPackages.stable;

  services.xserver.videoDrivers = [ "nvidia" ];

  # services.desktopManager.plasma6.enable = true;

  # Configure keymap in X11
  services.xserver = {
    xkb.layout = "us";
    xkb.variant = "";
  };

  # Enable CUPS to print documents.
  services.printing.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’.
  users.users.youwen = {
    isNormalUser = true;
    description = "Youwen Wu";
    extraGroups = [ "networkmanager" "wheel" "nixos" "realtime" ];
  };

  users.groups.realtime = { };

  nix.settings = {
    trusted-users = [ "root" "youwen" ];
    experimental-features = [ "nix-command" "flakes" ];
  };

  services.udev.extraRules = ''
    KERNEL=="cpu_dma_latency", GROUP="realtime"
  '';

  security.pam.loginLimits = [
    {
      domain = "@realtime";
      type = "-";
      item = "rtprio";
      value = 98;
    }
    {
      domain = "@realtime";
      type = "-";
      item = "memlock";
      value = "unlimited";
    }
    {
      domain = "@realtime";
      type = "-";
      item = "nice";
      value = -11;
    }
  ];

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

  # List packages installed in system profile. To search, run:
  # $ nix search wget
  environment.systemPackages = with pkgs; [
    neovim
    wget
    git
    curl
    librewolf
    gnumake
    clang
    gcc
    cachix
    nodejs_22
    cargo
    rustc
    gnupg
    openssh
    python3
    (pkgs.catppuccin-sddm.override { flavor = "mocha"; })
    steam-run

    # deps for neovim compilation
    lua51Packages.lua
    lua51Packages.luarocks
    tree-sitter
  ];

  environment.variables = {
    EDITOR = "nvim";
    NIX_AUTO_RUN = 1;
  };

  # tells electron apps to use Wayland
  environment.sessionVariables.NIXOS_OZONE_WL = "1";

  # 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;
  };

  programs.dconf.enable = true;

  programs.hyprland.enable = 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 = "24.05"; # Did you read the comment?

  programs.zsh.enable = false;
  programs.fish.enable = true;
  users.users.youwen.shell = pkgs.fish;
}