Resolving dependencies...
Configuring dlist-0.8.0.2...
Configuring base-compat-0.9.1...
Building dlist-0.8.0.2...
Building base-compat-0.9.1...
Configuring primitive-0.6.1.0...
Installed dlist-0.8.0.2
Building primitive-0.6.1.0...
Configuring safe-0.3.10...
Installed base-compat-0.9.1
Building safe-0.3.10...
Configuring mtl-2.2.1...
Installed safe-0.3.10
Building mtl-2.2.1...
Configuring time-locale-compat-0.1.1.3...
Installed primitive-0.6.1.0
Building time-locale-compat-0.1.1.3...
Configuring text-1.2.2.1...
Installed time-locale-compat-0.1.1.3
Building text-1.2.2.1...
Configuring transformers-compat-0.5.1.4...
Installed mtl-2.2.1
Building transformers-compat-0.5.1.4...
Installed transformers-compat-0.5.1.4
Configuring vector-0.11.0.0...
Building vector-0.11.0.0...
Configuring tagged-0.8.5...
Installed text-1.2.2.1
Building tagged-0.8.5...
Installed tagged-0.8.5
Configuring hashable-1.2.4.0...
Building hashable-1.2.4.0...
Installed hashable-1.2.4.0
Configuring unordered-containers-0.2.7.1...
Building unordered-containers-0.2.7.1...
Installed vector-0.11.0.0
Configuring scientific-0.3.4.9...
Building scientific-0.3.4.9...
Installed unordered-containers-0.2.7.1
Installed scientific-0.3.4.9
Configuring attoparsec-0.13.1.0...
Building attoparsec-0.13.1.0...
Installed attoparsec-0.13.1.0
Configuring aeson-1.0.2.1...
Building aeson-1.0.2.1...
Installed aeson-1.0.2.1
Configuring t3-game-0.1.0.0...
Building t3-game-0.1.0.0...
Failed to install t3-game-0.1.0.0
Build log ( /home/builder/.cabal/logs/t3-game-0.1.0.0.log ):
cabal: Entering directory '/tmp/cabal-tmp-28337/t3-game-0.1.0.0'
Configuring t3-game-0.1.0.0...
Building t3-game-0.1.0.0...
Preprocessing library t3-game-0.1.0.0...
[1 of 5] Compiling T3.Game.Types    ( src/T3/Game/Types.hs, dist/build/T3/Game/Types.o )
[2 of 5] Compiling T3.Game.Core     ( src/T3/Game/Core.hs, dist/build/T3/Game/Core.o )

src/T3/Game/Core.hs:128:10: error:
    • Overlapping instances for FromJSON (Maybe XO)
        arising from a use of ‘aeson-1.0.2.1:Data.Aeson.Types.FromJSON.$dmparseJSONList’
      Matching instances:
        instance FromJSON a => FromJSON (Maybe a)
          -- Defined in ‘aeson-1.0.2.1:Data.Aeson.Types.FromJSON’
        instance FromJSON (Maybe XO)
          -- Defined at src/T3/Game/Core.hs:128:10
    • In the expression:
        aeson-1.0.2.1:Data.Aeson.Types.FromJSON.$dmparseJSONList @Maybe XO
      In an equation for ‘parseJSONList’:
          parseJSONList
            = aeson-1.0.2.1:Data.Aeson.Types.FromJSON.$dmparseJSONList
                @Maybe XO
      In the instance declaration for ‘FromJSON (Maybe XO)’

src/T3/Game/Core.hs:137:34: error:
    • Overlapping instances for FromJSON (Maybe XO)
        arising from a use of ‘parseJSON’
      Matching instances:
        instance FromJSON a => FromJSON (Maybe a)
          -- Defined in ‘aeson-1.0.2.1:Data.Aeson.Types.FromJSON’
        instance FromJSON (Maybe XO)
          -- Defined at src/T3/Game/Core.hs:128:10
    • In a stmt of a 'do' block: cells :: [[Maybe XO]] <- parseJSON o
      In the expression:
        do { cells :: [[Maybe XO]] <- parseJSON o;
             let correctRowSize = length cells == size;
             let correctColSize = and $ map ((== size) . length) cells;
             let pairs = ...;
             .... }
      In an equation for ‘board’:
          board o
            = do { cells :: [[Maybe XO]] <- parseJSON o;
                   let correctRowSize = ...;
                   let correctColSize = ...;
                   .... }
cabal: Leaving directory '/tmp/cabal-tmp-28337/t3-game-0.1.0.0'
cabal: Error: some packages failed to install:
t3-game-0.1.0.0 failed during the building phase. The exception was:
ExitFailure 1