build pipeline plugin links are all 404

[bl0ck3r]

The links on the build result page created by the build pipeline plugin are all broken and yield 404.
The links look like this:
http://host/1997eef2-85a8-407c-ac43-11bc67cb7403/job/jobName/

What is that hex number for? How do I fix these links?

Thanks,
Martin