Resolving dependencies...
Configuring call-stack-0.1.0...
Configuring mtl-2.2.1...
Building call-stack-0.1.0...
Building mtl-2.2.1...
Installed call-stack-0.1.0
Configuring old-locale-1.0.0.7...
Building old-locale-1.0.0.7...
Installed old-locale-1.0.0.7
Configuring random-1.1...
Building random-1.1...
Configuring HUnit-1.5.0.0...
Installed mtl-2.2.1
Building HUnit-1.5.0.0...
Installed random-1.1
Installed HUnit-1.5.0.0
Configuring hogg-0.4.1.1...
Building hogg-0.4.1.1...
Failed to install hogg-0.4.1.1
Build log ( /home/builder/.cabal/logs/hogg-0.4.1.1.log ):
cabal: Entering directory '/tmp/cabal-tmp-20634/hogg-0.4.1.1'
Configuring hogg-0.4.1.1...
Building hogg-0.4.1.1...
Preprocessing library hogg-0.4.1.1...
[ 1 of 20] Compiling Codec.Container.Ogg.TimeScheme ( Codec/Container/Ogg/TimeScheme.hs, dist/build/Codec/Container/Ogg/TimeScheme.o )
[ 2 of 20] Compiling Codec.Container.Ogg.Timestamp ( Codec/Container/Ogg/Timestamp.hs, dist/build/Codec/Container/Ogg/Timestamp.o )
[ 3 of 20] Compiling Codec.Container.Ogg.MessageHeaders ( Codec/Container/Ogg/MessageHeaders.hs, dist/build/Codec/Container/Ogg/MessageHeaders.o )
[ 4 of 20] Compiling Codec.Container.Ogg.List ( Codec/Container/Ogg/List.hs, dist/build/Codec/Container/Ogg/List.o )
[ 5 of 20] Compiling Codec.Container.Ogg.Serial ( Codec/Container/Ogg/Serial.hs, dist/build/Codec/Container/Ogg/Serial.o )

Codec/Container/Ogg/Serial.hs:48:10: error:
    Duplicate instance declarations:
      instance Random Serial
        -- Defined at Codec/Container/Ogg/Serial.hs:48:10
      instance Random Word32 -- Defined in ‘System.Random’
cabal: Leaving directory '/tmp/cabal-tmp-20634/hogg-0.4.1.1'
cabal: Error: some packages failed to install:
hogg-0.4.1.1 failed during the building phase. The exception was:
ExitFailure 1