{
  lib,
  config,
  ...
}: let
  configDir = "/var/lib/hass";
in
  lib.mkIf (config.host.impermanence.enable && config.services.home-assistant.enable) {
    assertions = [
      {
        assertion = config.services.home-assistant.configDir == configDir;
        message = "home assistant config directory does not match persistence";
      }
    ];
    environment.persistence."/persist/system/root" = {
      enable = true;
      hideMounts = true;
      directories = [
        {
          directory = configDir;
          user = "hass";
          group = "hass";
        }
      ];
    };
  }