compilation error in Tez master

[Julien Le Dem]

Hi
I'm trying to build Tez but I get compilation errors.
For example in tez-mapreduce it is using "new FSDownload(...)" with an extra 
parameter (Random) that is not in hadoop-yarn-project that I built from trunk.
Does Tez depend on a specific branch of Yarn?
What else do I need to build?
Julien