Resolving dependencies... Configuring parallel-3.2.0.4... Building parallel-3.2.0.4... Preprocessing library parallel-3.2.0.4... [1 of 3] Compiling Control.Parallel ( Control/Parallel.hs, dist/build/Control/Parallel.o ) [2 of 3] Compiling Control.Seq ( Control/Seq.hs, dist/build/Control/Seq.o ) [3 of 3] Compiling Control.Parallel.Strategies ( Control/Parallel/Strategies.hs, dist/build/Control/Parallel/Strategies.o ) In-place registering parallel-3.2.0.4... Running Haddock for parallel-3.2.0.4... Running hscolour for parallel-3.2.0.4... Preprocessing library parallel-3.2.0.4... Preprocessing library parallel-3.2.0.4... Warning: The documentation for the following packages are not installed. No links will be generated to these packages: rts-1.0 Haddock coverage: 100% ( 3 / 3) in 'Control.Parallel' 72% ( 21 / 29) in 'Control.Seq' 81% ( 68 / 84) in 'Control.Parallel.Strategies' Documentation created: dist/doc/html/parallel/index.html Installing library in /srv/hackage/var/build/tmp-install/lib/parallel-3.2.0.4/ghc-7.6.3 Registering parallel-3.2.0.4... Installed parallel-3.2.0.4 Downloading heukarya-0.2.0.2... Configuring heukarya-0.2.0.2... Building heukarya-0.2.0.2... Preprocessing library heukarya-0.2.0.2... src/AI/Heukarya/Center.hs:19:8: Could not find module `Control.Monad.IO.Class' It is a member of the hidden package `transformers-0.3.0.0'. Perhaps you need to add `transformers' to the build-depends in your .cabal file. Use -v to see a list of the files searched for. Failed to install heukarya-0.2.0.2 cabal: Error: some packages failed to install: heukarya-0.2.0.2 failed during the building phase. The exception was: ExitFailure 1