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Downloading stack-0.0.1...
Configuring stack-0.0.1...
Building stack-0.0.1...
Failed to install stack-0.0.1
Build log ( /home/builder/.cabal/logs/stack-0.0.1.log ):
cabal: Entering directory '/tmp/cabal-tmp-6380/stack-0.0.1'
Configuring stack-0.0.1...
Building stack-0.0.1...
Preprocessing library stack-0.0.1...
[ 1 of 45] Compiling System.Process.Read ( src/System/Process/Read.hs, dist/build/System/Process/Read.o )
[ 2 of 45] Compiling System.Process.PagerEditor ( src/System/Process/PagerEditor.hs, dist/build/System/Process/PagerEditor.o )
[ 3 of 45] Compiling Stack.Types.Version ( src/Stack/Types/Version.hs, dist/build/Stack/Types/Version.o )

src/Stack/Types/Version.hs:97:10: error:
    • Overlapping instances for FromJSON (Map MajorVersion a)
        arising from a use of ‘aeson-1.0.2.1:Data.Aeson.Types.FromJSON.$dmparseJSONList’
      Matching instances:
        instance (FromJSONKey k, Ord k, FromJSON v) => FromJSON (Map k v)
          -- Defined in ‘aeson-1.0.2.1:Data.Aeson.Types.FromJSON’
        instance FromJSON a => FromJSON (Map MajorVersion a)
          -- Defined at src/Stack/Types/Version.hs:97:10
    • In the expression:
        aeson-1.0.2.1:Data.Aeson.Types.FromJSON.$dmparseJSONList
          @Map MajorVersion a
      In an equation for ‘parseJSONList’:
          parseJSONList
            = aeson-1.0.2.1:Data.Aeson.Types.FromJSON.$dmparseJSONList
                @Map MajorVersion a
      In the instance declaration for ‘FromJSON (Map MajorVersion a)’
cabal: Leaving directory '/tmp/cabal-tmp-6380/stack-0.0.1'
cabal: Error: some packages failed to install:
stack-0.0.1 failed during the building phase. The exception was:
ExitFailure 1