Resolving dependencies...
Downloading nntp-0.0.2...
Configuring nntp-0.0.2...
Building nntp-0.0.2...
Preprocessing library nntp-0.0.2...
[1 of 5] Compiling Network.NNTP.Internal ( src/Network/NNTP/Internal.hs, dist/build/Network/NNTP/Internal.o )

src/Network/NNTP/Internal.hs:108:28:
    Could not deduce (Functor m) arising from a use of `<$>'
    from the context (Monad m)
      bound by the instance declaration
      at src/Network/NNTP/Internal.hs:107:10-37
    Possible fix:
      add (Functor m) to the context of
        the type signature for fmap :: (a -> b) -> NntpT m a -> NntpT m b
        or the instance declaration
    In the second argument of `($)', namely `f <$> runNntpT m'
    In the expression: NntpT $ f <$> runNntpT m
    In an equation for `fmap': f fmap m = NntpT $ f <$> runNntpT m
Failed to install nntp-0.0.2
cabal: Error: some packages failed to install:
nntp-0.0.2 failed during the building phase. The exception was:
ExitFailure 1