Resolving dependencies...
Configuring data-default-class-0.1.2.0...
Configuring dlist-0.8.0.3...
Building data-default-class-0.1.2.0...
Building dlist-0.8.0.3...
Installed data-default-class-0.1.2.0
Configuring old-locale-1.0.0.7...
Building old-locale-1.0.0.7...
Configuring syb-0.7...
Installed dlist-0.8.0.3
Building syb-0.7...
Configuring text-1.2.2.2...
Installed old-locale-1.0.0.7
Building text-1.2.2.2...
Configuring data-default-instances-containers-0.0.1...
Installed syb-0.7
Building data-default-instances-containers-0.0.1...
Installed data-default-instances-containers-0.0.1
Configuring data-default-instances-dlist-0.0.1...
Building data-default-instances-dlist-0.0.1...
Configuring old-time-1.1.0.3...
Installed data-default-instances-dlist-0.0.1
Building old-time-1.1.0.3...
Configuring data-default-instances-old-locale-0.0.1...
Installed old-time-1.1.0.3
Building data-default-instances-old-locale-0.0.1...
Installed data-default-instances-old-locale-0.0.1
Configuring data-default-0.7.1.1...
Building data-default-0.7.1.1...
Installed data-default-0.7.1.1
Installed text-1.2.2.2
Configuring hashable-1.2.6.1...
Configuring polyparse-1.12...
Building hashable-1.2.6.1...
Building polyparse-1.12...
Installed hashable-1.2.6.1
Configuring unordered-containers-0.2.8.0...
Building unordered-containers-0.2.8.0...
Installed polyparse-1.12
Configuring cpphs-1.20.8...
Building cpphs-1.20.8...
Installed unordered-containers-0.2.8.0
Configuring uniplate-1.6.12...
Building uniplate-1.6.12...
Installed cpphs-1.20.8
Configuring haskell-src-exts-1.19.1...
Building haskell-src-exts-1.19.1...
Installed uniplate-1.6.12
Installed haskell-src-exts-1.19.1
Configuring haskell-src-exts-util-0.2.1...
Building haskell-src-exts-util-0.2.1...
Failed to install haskell-src-exts-util-0.2.1
Build log ( /home/builder/.cabal/logs/haskell-src-exts-util-0.2.1.log ):
cabal: Entering directory '/tmp/cabal-tmp-15273/haskell-src-exts-util-0.2.1'
Configuring haskell-src-exts-util-0.2.1...
Building haskell-src-exts-util-0.2.1...
Preprocessing library haskell-src-exts-util-0.2.1...
[1 of 5] Compiling Paths_haskell_src_exts_util ( dist/build/autogen/Paths_haskell_src_exts_util.hs, dist/build/Paths_haskell_src_exts_util.o )
[2 of 5] Compiling Language.Haskell.Exts.Util.Internal ( src/Language/Haskell/Exts/Util/Internal.hs, dist/build/Language/Haskell/Exts/Util/Internal.o )
[3 of 5] Compiling Language.Haskell.Exts.FreeVars ( src/Language/Haskell/Exts/FreeVars.hs, dist/build/Language/Haskell/Exts/FreeVars.o )

src/Language/Haskell/Exts/FreeVars.hs:108:39: error:
    Ambiguous occurrence ‘Alt’
    It could refer to either ‘Data.Monoid.Alt’,
                             imported from ‘Data.Monoid’ at src/Language/Haskell/Exts/FreeVars.hs:18:1-28
                          or ‘Language.Haskell.Exts.Alt’,
                             imported from ‘Language.Haskell.Exts’ at src/Language/Haskell/Exts/FreeVars.hs:21:1-38
                             (and originally defined in ‘Language.Haskell.Exts.Syntax’)

src/Language/Haskell/Exts/FreeVars.hs:111:39: error:
    Ambiguous occurrence ‘Alt’
    It could refer to either ‘Data.Monoid.Alt’,
                             imported from ‘Data.Monoid’ at src/Language/Haskell/Exts/FreeVars.hs:18:1-28
                          or ‘Language.Haskell.Exts.Alt’,
                             imported from ‘Language.Haskell.Exts’ at src/Language/Haskell/Exts/FreeVars.hs:21:1-38
                             (and originally defined in ‘Language.Haskell.Exts.Syntax’)
cabal: Leaving directory '/tmp/cabal-tmp-15273/haskell-src-exts-util-0.2.1'
cabal: Error: some packages failed to install:
haskell-src-exts-util-0.2.1 failed during the building phase. The exception
was:
ExitFailure 1