nixos-config/nixos/system/all/defaults.nix

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

  imports = [ ./packages.nix ];
  # provide overlays
  # -----------------
  nixpkgs.overlays = [ (import ../../pkgs) ];

  # allow un-free
  # -------------
  nixpkgs.config.allowUnfree = true;
  environment.variables.NIXPKGS_ALLOW_UNFREE = "1";

  # some system stuff
  # -----------------
  time.timeZone = lib.mkDefault "Europe/Berlin";
  #time.timeZone = lib.mkDefault "Pacific/Auckland";
  #time.timeZone = lib.mkDefault "Asia/Singapore";
  #time.timeZone = lib.mkDefault "Asia/Makassar";

  # keyboard fiddling
  i18n.defaultLocale = lib.mkDefault "en_US.UTF-8";
  console.font = "Lat2-Terminus16";
  console.keyMap = lib.mkDefault "us";
  services.xserver.layout = lib.mkDefault "us";

  # swappiness
  # ----------
  # 0 = only when running out of RAM
  # 100 = always swapp
  boot.kernel.sysctl."vm.swappiness" = 0;

  # rewire NIX_PATH
  # ---------------
  #environment.variables.NIX_PATH = lib.mkForce "/var/src";
  nix.nixPath = [ "nixpkgs=${pkgs.path}" ];

  # how much configurations should be kept?
  boot.loader.systemd-boot.configurationLimit = lib.mkDefault 3;
  boot.loader.generic-extlinux-compatible.configurationLimit = lib.mkDefault 3;
  boot.loader.grub.configurationLimit = lib.mkDefault 3;


  # Machines should be fast by default
  # ----------------------------------
  powerManagement.cpuFreqGovernor = lib.mkDefault "ondemand";

  # set vim to the default editor
  # -----------------------------
  programs.vim.defaultEditor = true;

}