Build is stuck

Hi

i try to run this example. I use Gradle 4.0.1 and java 8 u131

> Configure project :target.p2
p2AsMaven eclipse-deps is dirty.
Initalizing maven group eclipse-deps from p2
Only needs to be done once, future builds will be much faster
p2AsMaven eclipse-deps installing from p2
Buildfile: <...>\Temp\goomph-ant-build8459310540695597019.xml
[p2.mirror] SLF4J: Class path contains multiple SLF4J bindings.
[p2.mirror] SLF4J: Found binding in [jar:file:/<...>/.gradle/caches/4.0.1/generated-gradle-jars/gradle-api-4
.0.1.jar!/org/slf4j/impl/StaticLoggerBinder.class]
[p2.mirror] SLF4J: Found binding in [jar:file:/C:/Gradle/lib/gradle-logging-4.0.1.jar!/org/slf4j/impl/StaticLoggerBinder
.class]
[p2.mirror] SLF4J: See http://www.slf4j.org/codes.html#multiple_bindings for an explanation.
[p2.mirror] SLF4J: Actual binding is of type [org.gradle.internal.logging.slf4j.OutputEventListenerBackedLoggerContext]
<=------------> 14% CONFIGURING [2m 26s]
> root project

This seems to hang, it tried to run it for several minutes. No network activity either.