Resolving dependencies...
Downloading kqueue-0.1.2.5...
Configuring kqueue-0.1.2.5...
cabal: The program c2hs is required but it could not be found.
Failed to install kqueue-0.1.2.5
cabal: Error: some packages failed to install:
kqueue-0.1.2.5 failed during the configure step. The exception was:
ExitFailure 1