Resolving dependencies...
Downloading control-monad-failure-0.5.0...
Configuring failure-0.2.0.3...
Configuring mtl-2.2.1...
Building mtl-2.2.1...
Building failure-0.2.0.3...
Installed failure-0.2.0.3
Downloading safe-failure-0.5.0.2...
Configuring syb-0.6...
Building syb-0.6...
Configuring text-1.2.2.1...
Installed mtl-2.2.1
Building text-1.2.2.1...
Configuring control-monad-failure-0.5.0...
Installed syb-0.6
Building control-monad-failure-0.5.0...
Configuring safe-failure-0.5.0.2...
Failed to install control-monad-failure-0.5.0
Build log ( /home/builder/.cabal/logs/control-monad-failure-0.5.0.log ):
cabal: Entering directory '/tmp/cabal-tmp-8431/control-monad-failure-0.5.0'
Configuring control-monad-failure-0.5.0...
Building control-monad-failure-0.5.0...
Preprocessing library control-monad-failure-0.5.0...
[1 of 3] Compiling Control.Monad.Failure.Class ( Control/Monad/Failure/Class.hs, dist/build/Control/Monad/Failure/Class.o )
[2 of 3] Compiling Control.Monad.Failure.Transformers ( Control/Monad/Failure/Transformers.hs, dist/build/Control/Monad/Failure/Transformers.o )

Control/Monad/Failure/Transformers.hs:12:1: error:
    Failed to load interface for ‘Control.Monad.Trans’
    Perhaps you meant
      Control.Monad.Trans (needs flag -package-key mtl-2.2.1)
      Control.Monad.Cont (needs flag -package-key mtl-2.2.1)
      Control.Monad.Error (needs flag -package-key mtl-2.2.1)
cabal: Leaving directory '/tmp/cabal-tmp-8431/control-monad-failure-0.5.0'
Building safe-failure-0.5.0.2...
Installed safe-failure-0.5.0.2
Installed text-1.2.2.1
Configuring parsec-3.1.11...
Configuring tagsoup-0.14...
Building tagsoup-0.14...
Building parsec-3.1.11...
Installed parsec-3.1.11
Configuring json-0.9.1...
Building json-0.9.1...
Installed tagsoup-0.14
Installed json-0.9.1
cabal: Error: some packages failed to install:
authenticate-0.2.1 depends on control-monad-failure-0.5.0 which failed to
install.
control-monad-failure-0.5.0 failed during the building phase. The exception
was:
ExitFailure 1
http-wget-0.2.1 depends on control-monad-failure-0.5.0 which failed to
install.