{ lib, config, ... }: let radarr_data_directory = "/var/lib/radarr/.config/Radarr"; in { config = lib.mkIf (config.services.radarr.enable && config.host.impermanence.enable) { assertions = [ { assertion = config.services.radarr.dataDir == radarr_data_directory; message = "radarr data directory does not match persistence"; } ]; environment.persistence."/persist/system/root" = { directories = [ { directory = radarr_data_directory; user = "radarr"; group = "radarr"; } ]; }; }; }