{ config, pkgs, lib, isUnstable, ... }: let nixOptions = { gc = { automatic = true; dates = "daily"; options = "--delete-older-than 10d"; }; # Enable flakes package = pkgs.nixUnstable; extraOptions = '' experimental-features = nix-command flakes ''; }; in { nix = { settings.auto-optimise-store = true; } // nixOptions; }