Resolving dependencies... Configuring mtl-2.2.1... Building mtl-2.2.1... Installed mtl-2.2.1 Configuring monoid-absorbing-0.1.0.1... Building monoid-absorbing-0.1.0.1... Failed to install monoid-absorbing-0.1.0.1 Build log ( /home/builder/.cabal/logs/monoid-absorbing-0.1.0.1.log ): cabal: Entering directory '/tmp/cabal-tmp-1449/monoid-absorbing-0.1.0.1' Configuring monoid-absorbing-0.1.0.1... Building monoid-absorbing-0.1.0.1... Preprocessing library monoid-absorbing-0.1.0.1... [1 of 2] Compiling Data.Monoid.Zero ( src/Data/Monoid/Zero.hs, dist/build/Data/Monoid/Zero.o ) [2 of 2] Compiling Data.List.Cut ( src/Data/List/Cut.hs, dist/build/Data/List/Cut.o ) src/Data/List/Cut.hs:77:10: error: • Could not deduce (GHC.Base.Alternative (CutListT m)) arising from the superclasses of an instance declaration from the context: Monad m bound by the instance declaration at src/Data/List/Cut.hs:77:10-44 • In the instance declaration for ‘MonadPlus (CutListT m)’ cabal: Leaving directory '/tmp/cabal-tmp-1449/monoid-absorbing-0.1.0.1' cabal: Error: some packages failed to install: monoid-absorbing-0.1.0.1 failed during the building phase. The exception was: ExitFailure 1