Resolving dependencies...
Configuring random-1.1...
Configuring mtl-2.2.1...
Building random-1.1...
Building mtl-2.2.1...
Installed random-1.1
Configuring transformers-compat-0.5.1.4...
Building transformers-compat-0.5.1.4...
Installed mtl-2.2.1
Installed transformers-compat-0.5.1.4
Configuring MonadRandom-0.4.2.3...
Building MonadRandom-0.4.2.3...
Installed MonadRandom-0.4.2.3
Downloading h2048-0.1.0.1...
Configuring h2048-0.1.0.1...
Building h2048-0.1.0.1...
Failed to install h2048-0.1.0.1
Build log ( /home/builder/.cabal/logs/h2048-0.1.0.1.log ):
cabal: Entering directory '/tmp/cabal-tmp-32753/h2048-0.1.0.1'
Configuring h2048-0.1.0.1...
Building h2048-0.1.0.1...
Preprocessing library h2048-0.1.0.1...
[1 of 2] Compiling System.Game.H2048.Utils ( src/System/Game/H2048/Utils.hs, dist/build/System/Game/H2048/Utils.o )
[2 of 2] Compiling System.Game.H2048.Core ( src/System/Game/H2048/Core.hs, dist/build/System/Game/H2048/Core.o )
Preprocessing executable 'h2048-simple' for h2048-0.1.0.1...
[1 of 1] Compiling Main             ( src/MainSimple.hs, dist/build/h2048-simple/h2048-simple-tmp/Main.o )

src/MainSimple.hs:4:1: error:
    Failed to load interface for ‘System.Game.H2048.UI.Simple’
    Perhaps you meant
      System.Game.H2048.Utils (needs flag -package-key h2048-0.1.0.1)
    Use -v to see a list of the files searched for.
cabal: Leaving directory '/tmp/cabal-tmp-32753/h2048-0.1.0.1'
cabal: Error: some packages failed to install:
h2048-0.1.0.1 failed during the building phase. The exception was:
ExitFailure 1