Drools runtime created by plugin misses java compiler

Description of problem:
If yu create new drools runtime using the 'Create a new Drools 6 Runtime' button, it can't run the rules. It complains about missing Eclipse compiler class.

Version-Release number of selected component (if applicable):
JBDS 7
JBoss Drools Core 6.0.0.201308222359 org.drools.eclipse.feature.feature.group

How reproducible:

Steps to Reproduce:
1. create a new Drools runtime
2. create a project usint the generated runtime
3. run DroolsTest class

Actual results:
java.lang.RuntimeException: The Eclipse JDT Core jar is not in the classpath

Expected results:
The class runs fine and produces expected output.

Additional info: