Spark standalone and HDFS 2.6

[Grandl Robert]

Hi guys,
Probably a dummy question. Do you know how to compile Spark 0.9 to easily 
integrate with HDFS 2.6.0 ? 

I was trying 
sbt/sbt -Pyarn -Phadoop-2.6 assembly  
ormvn -Dhadoop.version=2.6.0 -DskipTests clean package
but none of these approaches succeeded. 

Thanks,Robert