I'm not sure if this is a recent regression but I just installed the Haskell Platfom 2012.2. The email for the maintainer dons@galois.com (Don Stewart) no longer seems to be valid. Dominic. Tests-MacBook-Pro:R Test$ ghc --version The Glorious Glasgow Haskell Compilation System, version 7.4.1 Tests-MacBook-Pro:R Test$ cabal install vector-random Resolving dependencies... Configuring vector-random-0.2... Building vector-random-0.2... Preprocessing library vector-random-0.2... [1 of 1] Compiling Data.Vector.Random.Mersenne ( Data/Vector/Random/Mersenne.hs, dist/build/Data/Vector/Random/Mersenne.o ) Data/Vector/Random/Mersenne.hs:85:5: The INLINE pragma for default method `random' lacks an accompanying binding cabal: Error: some packages failed to install: vector-random-0.2 failed during the building phase. The exception was: ExitFailure 1