Building with maven: compile error on model items

I’m trying to build OpenHAB with mvn install, but get a bunch of compile errors on the “Model Items” -module, example:

[ERROR] Failed to execute goal org.eclipse.tycho:tycho-compiler-plugin:0.22.0:compile (default-compile) on project org.openhab.model.item: Compilation failure: Compilation failure:
[ERROR] /var/jenkins_home/workspace/OpenHAB - dhabia/bundles/model/org.openhab.model.item/src/org/openhab/model/[15]
[ERROR] public class ItemsStandaloneSetup extends ItemsStandaloneSetupGenerated{
[ERROR] ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[ERROR] ItemsStandaloneSetupGenerated cannot be resolved to a type
[ERROR] /var/jenkins_home/workspace/OpenHAB - dhabia/bundles/model/org.openhab.model.item/src/org/openhab/model/[18]
[ERROR] new ItemsStandaloneSetup().createInjectorAndDoEMFRegistration();

Ideas anyone?

Full log (from Jenkins running Maven):

I do have similar issue in one of my environments.
I found that:
contains no files and thus these classes do not get compiled and therefore I get the compile error.