Resolving dependencies... Configuring mtl-2.2.1... Configuring syb-0.6... Building mtl-2.2.1... Building syb-0.6... Installed syb-0.6 Configuring haskell-src-1.0.2.0... Installed mtl-2.2.1 Building haskell-src-1.0.2.0... Installed haskell-src-1.0.2.0 Configuring pointful-1.0.1... Building pointful-1.0.1... Failed to install pointful-1.0.1 Build log ( /home/builder/.cabal/logs/pointful-1.0.1.log ): cabal: Entering directory '/tmp/cabal-tmp-22417/pointful-1.0.1' Configuring pointful-1.0.1... Building pointful-1.0.1... Preprocessing executable 'pointful' for pointful-1.0.1... [1 of 4] Compiling Lambdabot.FixPrecedence ( Lambdabot/FixPrecedence.hs, dist/build/pointful/pointful-tmp/Lambdabot/FixPrecedence.o ) [2 of 4] Compiling Lambdabot.Parser ( Lambdabot/Parser.hs, dist/build/pointful/pointful-tmp/Lambdabot/Parser.o ) Lambdabot/Parser.hs:9:1: error: Failed to load interface for ‘Data.Generics’ It is a member of the hidden package ‘syb-0.6’. Perhaps you need to add ‘syb’ to the build-depends in your .cabal file. Use -v to see a list of the files searched for. cabal: Leaving directory '/tmp/cabal-tmp-22417/pointful-1.0.1' cabal: Error: some packages failed to install: pointful-1.0.1 failed during the building phase. The exception was: ExitFailure 1