{ lib, pkgs, ... }:
{
  nix.settings.connect-timeout = 5;

  # Enable flakes
  nix.settings.experimental-features = [
    "nix-command"
    "flakes"
    "impure-derivations"
    "auto-allocate-uids"
  ];

  # use latest nix to hunt all the bugs
  nix.package = pkgs.nixVersions.latest;

  nix.settings.flake-registry = "";

  # The default at 10 is rarely enough.
  nix.settings.log-lines = lib.mkDefault 25;

  # Avoid disk full issues
  nix.settings.max-free = lib.mkDefault (3000 * 1024 * 1024);
  nix.settings.min-free = lib.mkDefault (512 * 1024 * 1024);

  # TODO: cargo culted.
  nix.daemonCPUSchedPolicy = lib.mkDefault "batch";
  nix.daemonIOSchedClass = lib.mkDefault "idle";
  nix.daemonIOSchedPriority = lib.mkDefault 7;

  # Avoid copying unnecessary stuff over SSH
  nix.settings.builders-use-substitutes = true;
}