anchor.diff:        exporterConfig = {
           enable = true;
           group = "openvpn";
  -        statusPaths = ["/run/openvpn-test"];
  -      };
  -      metricProvider = {
  -        users.groups.openvpn = {};
  +        statusPaths = [ "/run/openvpn-test" ];
  +      };
  +      metricProvider = {
  +        users.groups.openvpn = { };
           services.openvpn.servers.test = {
             config = ''
               dev tun
  
positive.code:     unifi-poller = {
        nodeName = "unifi_poller";
        exporterConfig.enable = true;
        exporterConfig.controllers = [ { } ];
        exporterTest = ''
          wait_for_unit("prometheus-unifi-poller-exporter.service")
          wait_for_open_port(9130)
  
negative.code:         url = "http://localhost";
        };
        metricProvider = {
          systemd.services.nc-pwfile =
            let
              passfile = (pkgs.writeText "pwfile" "snakeoilpw");
            in
            {
              requiredBy = [ "prometheus-nextcloud-exporter.service" ];
              before = [ "prometheus-nextcloud-exporter.service" ];
              serviceConfig.ExecStart = ''
                ${pkgs.coreutils}/bin/install -o nextcloud-exporter -m 0400 ${passfile} /var/nextcloud-pwfile
              '';
            };
          services.nginx = {
            enable = true;
            virtualHosts."localhost" = {
  