Resolving dependencies... Downloading largeword-1.2.0... Configuring largeword-1.2.0... Building largeword-1.2.0... Preprocessing library largeword-1.2.0... [1 of 1] Compiling Data.LargeWord ( Data/LargeWord.hs, dist/build/Data/LargeWord.o ) Data/LargeWord.hs:220:55: Not in scope: type constructor or class `FiniteBits' Failed to install largeword-1.2.0 cabal: Error: some packages failed to install: largeword-1.2.0 failed during the building phase. The exception was: ExitFailure 1