Resolving dependencies... Downloading activitystreams-aeson-0.2.0.1... Configuring activitystreams-aeson-0.2.0.1... Building activitystreams-aeson-0.2.0.1... Preprocessing library activitystreams-aeson-0.2.0.1... Codec/ActivityStream/Schema.hs:90:18: Could not find module ‘Data.Aeson.TH’ There are files missing in the ‘aeson-0.8.0.2’ package, try running 'ghc-pkg check'. Use -v to see a list of the files searched for. Codec/ActivityStream/Schema.hs:92:18: Could not find module ‘Data.Aeson’ There are files missing in the ‘aeson-0.8.0.2’ package, try running 'ghc-pkg check'. Use -v to see a list of the files searched for. Failed to install activitystreams-aeson-0.2.0.1 cabal: Error: some packages failed to install: activitystreams-aeson-0.2.0.1 failed during the building phase. The exception was: ExitFailure 1