{ config, lib, pkgs, ... }: { nix.settings = { substituters = [ "https://cache.nixos.org/" ]; trusted-public-keys = [ "cache.nixos.org-1:6NCHdD59X431o0gWypbMrAURkbJ16ZPMQFGspcDShjY=" ]; experimental-features = [ "nix-command" "flakes" ]; }; }