Resolving dependencies... Configuring shell-pipe-0.1... Building shell-pipe-0.1... Failed to install shell-pipe-0.1 Build log ( /home/builder/.cabal/logs/shell-pipe-0.1.log ): cabal: Entering directory '/tmp/cabal-tmp-12622/shell-pipe-0.1' [1 of 1] Compiling Main ( /tmp/cabal-tmp-12622/shell-pipe-0.1/dist/setup/setup.hs, /tmp/cabal-tmp-12622/shell-pipe-0.1/dist/setup/Main.o ) Linking /tmp/cabal-tmp-12622/shell-pipe-0.1/dist/setup/setup ... Configuring shell-pipe-0.1... Warning: No 'build-type' specified. If you do not need a custom Setup.hs or ./configure script then use 'build-type: Simple'. Warning: Instead of 'ghc-options: -cpp -cpp -cpp -cpp' use 'extensions: CPP CPP CPP CPP' Building shell-pipe-0.1... Preprocessing library shell-pipe-0.1... Shell.hs:1:12: warning: -ffi is deprecated: use -XForeignFunctionInterface or pragma {-# LANGUAGE ForeignFunctionInterface #-} instead [1 of 1] Compiling Shell ( Shell.hs, dist/build/Shell.o ) Shell.hs:8:1: error: Failed to load interface for ‘GHC.Handle’ Perhaps you meant GHC.IO.Handle (from base-4.9.0.0) Use -v to see a list of the files searched for. cabal: Leaving directory '/tmp/cabal-tmp-12622/shell-pipe-0.1' cabal: Error: some packages failed to install: shell-pipe-0.1 failed during the building phase. The exception was: ExitFailure 1