Resolving dependencies...
Configuring ghc-paths-0.1.0.9...
Configuring mtl-2.2.1...
Building mtl-2.2.1...
Building ghc-paths-0.1.0.9...
Installed mtl-2.2.1
Configuring parallel-3.2.1.0...
Configuring random-1.1...
Installed ghc-paths-0.1.0.9
Building parallel-3.2.1.0...
Building random-1.1...
Configuring text-1.2.2.1...
Installed parallel-3.2.1.0
Building text-1.2.2.1...
Installed random-1.1
Installed text-1.2.2.1
Configuring zeno-0.2.0.1...
Building zeno-0.2.0.1...
Failed to install zeno-0.2.0.1
Build log ( /home/builder/.cabal/logs/zeno-0.2.0.1.log ):
cabal: Entering directory '/tmp/cabal-tmp-28182/zeno-0.2.0.1'
Configuring zeno-0.2.0.1...
Building zeno-0.2.0.1...
Preprocessing executable 'zeno' for zeno-0.2.0.1...

src/Zeno/HaskellParser.hs:1:14: warning:
    -XDoRec is deprecated: use -XRecursiveDo or pragma {-# LANGUAGE RecursiveDo #-} instead
[ 1 of 25] Compiling Zeno.Prelude     ( src/Zeno/Prelude.hs, dist/build/zeno/zeno-tmp/Zeno/Prelude.o )

src/Zeno/Prelude.hs:131:10: error:
    Duplicate instance declarations:
      instance Functor First -- Defined at src/Zeno/Prelude.hs:131:10
      instance Functor First -- Defined in ‘Data.Monoid’
cabal: Leaving directory '/tmp/cabal-tmp-28182/zeno-0.2.0.1'
cabal: Error: some packages failed to install:
zeno-0.2.0.1 failed during the building phase. The exception was:
ExitFailure 1