nixos-config/modules/system/core/default.nix

{ pkgs, config, lib, ... }:
with lib;

let
  cfg = config.eb.core;
in
{
  options.eb.core = {
    enable = mkOption {
      description = "Enable core options";
      type = types.bool;
      default = true;
    };
  };

  config = mkIf (cfg.enable) {
    nix = {
      package = pkgs.nixUnstable;
      extraOptions = "experimental-features = nix-command flakes";
      gc = {
        automatic = true;
        options = "--delete-older-than 10d";
      };
    };

    environment.shells = [ pkgs.fish pkgs.zsh pkgs.bash ];

    console = {
      font = "Lat2-Terminus16";
    };

    i18n.defaultLocale = "en_US.UTF-8";
    time.timeZone = "Europe/Amsterdam";

    powerManagement.cpuFreqGovernor = lib.mkDefault "performance";
    hardware.enableRedistributableFirmware = lib.mkDefault true;

    environment.systemPackages = with pkgs; [
      unzip

      zsh
      fish

      gawk
      gnused

      curl
      xh

      bottom
      acpi
      pstree

      git

      patchelf
      nix-index
      manix

      neovim
    ];

    security.sudo.extraConfig = ''Defaults env_reset,timestamp_timeout=5,insults,lecture="always"'';
    security.sudo.execWheelOnly = true;

    services.openssh.enable = true;

    hardware.opengl = {
      enable = true;
      driSupport = true;
    };
  };
}