To reproduce:
1. Download zip file of project from OwnCloud and unzip..
3. Edit BuildCommand.bat to point to the installation directory of Unity
4. Edit install-service.bat to enter your Windows username and password, e.g sc config camobuild obj= .\bob password= bobspass
5. Run install-service.lnk and click yes to Admin prompt.
6. Run run-service.lnk and click yes to Admin prompt. Two powershell windows should pop up, one will have a log of Editor.log.
7. Wait for a while
8. Eventually, you should see:

(Filename: C:\buildslave\unity\build\Editor/Platform/Windows/ExternalProcess.cpp Line: 221)
Failed executing external process for 'Bake Runtime' job.

Reproduced in 2017.2.0p1, 2017.2.1p3