Resolving dependencies... Configuring rmonad-0.4... Building rmonad-0.4... Failed to install rmonad-0.4 Build log ( /home/builder/.cabal/logs/rmonad-0.4.log ): cabal: Entering directory '/tmp/cabal-tmp-1118/rmonad-0.4' Warning: rmonad.cabal: A package using 'cabal-version: >=1.2' must use section syntax. See the Cabal user guide for details. Configuring rmonad-0.4... Building rmonad-0.4... Preprocessing library rmonad-0.4... [1 of 8] Compiling Control.RMonad ( src/Control/RMonad.hs, dist/build/Control/RMonad.o ) src/Control/RMonad.hs:68:1: error: Failed to load interface for ‘Data.Suitable’ Use -v to see a list of the files searched for. cabal: Leaving directory '/tmp/cabal-tmp-1118/rmonad-0.4' cabal: Error: some packages failed to install: rmonad-0.4 failed during the building phase. The exception was: ExitFailure 1