Subject => "Hydra job $jobName build " . $build->id . ": $status",

            Subject => "Hydra job $jobName on " . $build->system . ", build " . $build->id . ": $status",

            'X-Hydra-Job'      => $build->job->name

            'X-Hydra-Job'      => $build->job->name,
            'X-Hydra-System'   => $build->system