GHC failing to build due to errors in DPH?

Hello, I am trying to build GHC head and get the following error: libraries/dph/dph-lifted-base/Data/Array/Parallel/PArray/Reference.hs:50:11: Ambiguous occurrence `fromList' It could refer to either `Data.Array.Parallel.PArray.Reference.fromList', defined at libraries/dph/dph-lifted-base/Data/Array This is using the stage 2 compiler and, I am guessing, is due to an interaction with the overloaded lists extension. I just deleted dph completely, and used `sync-all get` to get a fresh copy, but I get the same error. It looks like the nightly builds are working, so am I doing something wrong? More generally, I don't really need DPH, so is there an easy way to disable building it? -Iavor