Hello all I have installed ghc-7.4.0.20111219 and this announcementhttp://www.haskell.org/pipermail/glasgow-haskell-users/2011-December/021310....says that "The release candidate accidentally includes the random, primitive, vector and dph libraries. The final release will not include them". I tried to compile a program [ntro@localhost src]$ ghc-7.4.0.20111219 -c -Odph -fdph-par ParallelMat.hs ghc: unrecognised flags: -fdph-par Usage: For basic information, try the `--help' option. [ntro@localhost src]$ ghc-7.2.1 -c -Odph -fdph-par ParallelMat.hs Also in ghc-7.4.0.20111219 --help , i don't see any option related data parallel haskell. I search the ghc manual http://www.haskell.org/ghc/dist/stable/docs/html/users_guide/ and got one reference for data parallel haskellhttp://www.haskell.org/ghc/dist/stable/docs/html/users_guide/lang-parallel.h.... This link again redirects to data parallel haskell http://www.haskell.org/haskellwiki/GHC/Data_Parallel_Haskell wiki page using ghc-7.2.1. Could some one please tell me how to compile haskell program using dph with ghc-7.4.0.20111219. Regards Mukesh Tiwari