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Installed optparse-simple-0.0.3
Configuring stack-0.1.2.0...
Building stack-0.1.2.0...
Failed to install stack-0.1.2.0
Build log ( /home/builder/.cabal/logs/stack-0.1.2.0.log ):
cabal: Entering directory '/tmp/cabal-tmp-3437/stack-0.1.2.0'
Configuring stack-0.1.2.0...
Building stack-0.1.2.0...
Preprocessing library stack-0.1.2.0...
[ 1 of 58] Compiling System.Process.PagerEditor ( src/System/Process/PagerEditor.hs, dist/build/System/Process/PagerEditor.o )
[ 2 of 58] Compiling System.Process.Log ( src/System/Process/Log.hs, dist/build/System/Process/Log.o )
[ 3 of 58] Compiling System.Process.Read ( src/System/Process/Read.hs, dist/build/System/Process/Read.o )
[ 4 of 58] Compiling System.Process.Run ( src/System/Process/Run.hs, dist/build/System/Process/Run.o )
[ 5 of 58] Compiling Stack.New        ( src/Stack/New.hs, dist/build/Stack/New.o )
[ 6 of 58] Compiling Stack.FileWatch  ( src/Stack/FileWatch.hs, dist/build/Stack/FileWatch.o )
[ 7 of 58] Compiling Paths_stack      ( dist/build/autogen/Paths_stack.hs, dist/build/Paths_stack.o )
[ 8 of 58] Compiling Path.IO          ( src/Path/IO.hs, dist/build/Path/IO.o )

src/Path/IO.hs:227:33: error:
    Ambiguous occurrence ‘listDirectory’
    It could refer to either ‘System.Directory.listDirectory’,
                             imported from ‘System.Directory’ at src/Path/IO.hs:34:1-33
                          or ‘Path.IO.listDirectory’, defined at src/Path/IO.hs:107:1
cabal: Leaving directory '/tmp/cabal-tmp-3437/stack-0.1.2.0'
cabal: Error: some packages failed to install:
stack-0.1.2.0 failed during the building phase. The exception was:
ExitFailure 1