{ ... }:

{
  nix.settings = {
    substituters = [
      "http://nix-cache"
      "https://cache.nixos.org/"
    ];
    trusted-public-keys = [
      "cache.local-1:usoWYanY3Kpq2+kDIS2nhWoLZiRxanmdysdzqCFBHW4="
      "cache.nixos.org-1:6NCHdD59X431o0gWypbMrAURkbJ16ZPMQFGspcDShjY="
    ];
    auto-optimise-store = true;
  };
}