Resolving dependencies...
Configuring mtl-2.2.1...
Configuring text-1.2.2.1...
Building mtl-2.2.1...
Building text-1.2.2.1...
Installed mtl-2.2.1
Installed text-1.2.2.1
Configuring parsec-3.1.11...
Building parsec-3.1.11...
Installed parsec-3.1.11
Configuring Emping-0.3.1...
Building Emping-0.3.1...
Failed to install Emping-0.3.1
Build log ( /home/builder/.cabal/logs/Emping-0.3.1.log ):
cabal: Entering directory '/tmp/cabal-tmp-4728/Emping-0.3.1'
Configuring Emping-0.3.1...
Building Emping-0.3.1...
Preprocessing executable 'emping' for Emping-0.3.1...
[1 of 6] Compiling Reduce           ( src/Reduce.hs, dist/build/emping/emping-tmp/Reduce.o )
[2 of 6] Compiling Codec            ( src/Codec.hs, dist/build/emping/emping-tmp/Codec.o )

src/Codec.hs:35:13: error:
    • Data constructor not in scope:
        State :: ([String] -> (Int, [String])) -> State [String] Int
    • Perhaps you meant one of these:
        ‘StateT’ (imported from Control.Monad.State),
        variable ‘state’ (imported from Control.Monad.State)
cabal: Leaving directory '/tmp/cabal-tmp-4728/Emping-0.3.1'
cabal: Error: some packages failed to install:
Emping-0.3.1 failed during the building phase. The exception was:
ExitFailure 1