With burnttoast v1.1.0 the notification appears at the end of a build, but then there is a pause of a couple of seconds followed by Maven output:
[WARNING] Failed to notify spy fr.jcgay.maven.notifier.NotificationEventSpyChooser:
Check your configuration at: https://github.com/jcgay/send-notification/wiki/burnttoast
With burnttoast v1.1.0 the notification appears at the end of a build, but then there is a pause of a couple of seconds followed by Maven output: