Resolving dependencies...
Configuring mtl-2.2.1...
Configuring syb-0.6...
Building mtl-2.2.1...
Building syb-0.6...
Configuring text-1.2.2.1...
Installed syb-0.6
Installed mtl-2.2.1
Building text-1.2.2.1...
Installed text-1.2.2.1
Configuring parsec-3.1.11...
Building parsec-3.1.11...
Installed parsec-3.1.11
Configuring extcore-0.6...
Building extcore-0.6...
Failed to install extcore-0.6
Build log ( /home/builder/.cabal/logs/extcore-0.6.log ):
cabal: Entering directory '/tmp/cabal-tmp-18609/extcore-0.6'
Configuring extcore-0.6...
Building extcore-0.6...
Preprocessing library extcore-0.6...

Language/Core/Interp.hs:1:12: warning:
    -fglasgow-exts is deprecated: Use individual extensions instead
[ 1 of 20] Compiling Language.Core.Utils ( Language/Core/Utils.hs, dist/build/Language/Core/Utils.o )

Language/Core/Utils.hs:22:15: error:
    Ambiguous occurrence ‘everythingBut’
    It could refer to either ‘Data.Generics.everythingBut’,
                             imported from ‘Data.Generics’ at Language/Core/Utils.hs:6:1-20
                             (and originally defined in ‘Data.Generics.Schemes’)
                          or ‘Language.Core.Utils.everythingBut’,
                             defined at Language/Core/Utils.hs:26:1

Language/Core/Utils.hs:30:16: error:
    Ambiguous occurrence ‘everythingBut’
    It could refer to either ‘Data.Generics.everythingBut’,
                             imported from ‘Data.Generics’ at Language/Core/Utils.hs:6:1-20
                             (and originally defined in ‘Data.Generics.Schemes’)
                          or ‘Language.Core.Utils.everythingBut’,
                             defined at Language/Core/Utils.hs:26:1
cabal: Leaving directory '/tmp/cabal-tmp-18609/extcore-0.6'
cabal: Error: some packages failed to install:
extcore-0.6 failed during the building phase. The exception was:
ExitFailure 1