Resolving dependencies...
Configuring mtl-2.2.1...
Configuring split-0.2.3.1...
Building mtl-2.2.1...
Building split-0.2.3.1...
Installed split-0.2.3.1
Configuring stm-2.4.4.1...
Building stm-2.4.4.1...
Configuring text-1.2.2.1...
Installed mtl-2.2.1
Building text-1.2.2.1...
Configuring utf8-string-1.0.1.1...
Installed stm-2.4.4.1
Building utf8-string-1.0.1.1...
Configuring transformers-compat-0.5.1.4...
Installed utf8-string-1.0.1.1
Building transformers-compat-0.5.1.4...
Installed transformers-compat-0.5.1.4
Configuring exceptions-0.8.3...
Building exceptions-0.8.3...
Installed exceptions-0.8.3
Installed text-1.2.2.1
Configuring hashable-1.2.4.0...
Configuring blaze-builder-0.4.0.2...
Building blaze-builder-0.4.0.2...
Building hashable-1.2.4.0...
Configuring parsec-3.1.11...
Installed hashable-1.2.4.0
Configuring case-insensitive-1.2.0.7...
Installed blaze-builder-0.4.0.2
Building parsec-3.1.11...
Building case-insensitive-1.2.0.7...
Installed case-insensitive-1.2.0.7
Configuring http-types-0.9.1...
Building http-types-0.9.1...
Installed parsec-3.1.11
Installed http-types-0.9.1
Configuring web-routes-0.27.11...
Building web-routes-0.27.11...
Installed web-routes-0.27.11
Configuring web-routes-transformers-0.18...
Building web-routes-transformers-0.18...
Failed to install web-routes-transformers-0.18
Build log ( /home/builder/.cabal/logs/web-routes-transformers-0.18.log ):
cabal: Entering directory '/tmp/cabal-tmp-27493/web-routes-transformers-0.18'
Configuring web-routes-transformers-0.18...
Building web-routes-transformers-0.18...
Preprocessing library web-routes-transformers-0.18...
[1 of 1] Compiling Web.Routes.Transformers ( Web/Routes/Transformers.hs, dist/build/Web/Routes/Transformers.o )

Web/Routes/Transformers.hs:4:1: 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-27493/web-routes-transformers-0.18'
cabal: Error: some packages failed to install:
web-routes-transformers-0.18 failed during the building phase. The exception
was:
ExitFailure 1