I'm trying to cabal install binary-strict and I get this error:
src/Data/Binary/BitBuilder.hs:205:37: Ambiguous occurrence `unsafePerformIO' It could refer to either `Foreign.unsafePerformIO', imported from `Foreign' at src/Data/Binary/BitBuilder.hs:38:1-14 or `System.IO.Unsafe.unsafePerformIO', imported from `System.IO.Unsafe' at src/Data/Binary/BitBuilder.hs:42:26-40 (and originally defined in `GHC.IO') Failed to install binary-strict-0.4.8.1 cabal: Error: some packages failed to install: binary-strict-0.4.8.1 failed during the building phase. The exception was: ExitFailure 1
I'm running ghc 7.6.3. If it's relevant, I have binary-0.7.2.3 installed too.