DPH build breakage

[Ben Lippmeier]

limitingfactor:ghc-head benl$ "inplace/bin/ghc-stage2"   -H32m -O    -package-name dph-seq-0.5 -hide-all-packages -i -ilibraries/dph/dph-seq/../dph-common -ilibraries/dph/dph-seq/dist-install/build -ilibraries/dph/dph-seq/dist-install/build/autogen -Ilibraries/dph/dph-seq/dist-install/build -Ilibraries/dph/dph-seq/dist-install/build/autogen -Ilibraries/dph/dph-seq/.    -optP-include -optPlibraries/dph/dph-seq/dist-install/build/autogen/cabal_macros.h -package array-0.3.0.2 -package base-4.3.1.0 -package dph-base-0.5 -package dph-prim-seq-0.5 -package ghc-7.1.20110220 -package ghc-prim-0.2.0.0 -package random-1.0.0.3 -package template-haskell-2.5.0.0  -Odph -funbox-strict-fields -fcpr-off -fdph-this -package-name dph-seq -XHaskell98 -XTypeFamilies -XGADTs -XRankNTypes -XBangPatterns -XMagicHash -XUnboxedTuples -XTypeOperators -O2 -XGenerics -no-user-package-conf -rtsopts     -odir libraries/dph/dph-seq/dist-install/build -hidir libraries/dph/dph-seq/dist-install/build -stubdir libraries/dph/dph-seq/dist-install/build -hisuf hi -osuf  o -hcsuf hc -c libraries/dph/dph-seq/../dph-common/Data/Array/Parallel.hs -o libraries/dph/dph-seq/dist-install/build/Data/Array/Parallel.o
GHC error in desugarer lookup in dph-seq:Data.Array.Parallel:
  Failed to load interface for `Data.Array.Parallel.Prelude.Base.Tuple'
  Use -v to see a list of the files searched for.
ghc-stage2: panic! (the 'impossible' happened)
  (GHC version 7.1.20110220 for i386-apple-darwin):
	initDs IOEnv failure

Please report this as a GHC bug:  http://www.haskell.org/ghc/reportabug