Resolving dependencies...
Configuring primitive-0.6.2.0...
Configuring mtl-2.2.1...
Building mtl-2.2.1...
Building primitive-0.6.2.0...
Configuring random-1.1...
Installed mtl-2.2.1
Building random-1.1...
Installed primitive-0.6.2.0
Installed random-1.1
Configuring tf-random-0.5...
Building tf-random-0.5...
Installed tf-random-0.5
Configuring QuickCheck-2.9.2...
Building QuickCheck-2.9.2...
Installed QuickCheck-2.9.2
Configuring QuickCheck-GenT-0.1.2...
Building QuickCheck-GenT-0.1.2...
Failed to install QuickCheck-GenT-0.1.2
Build log ( /home/builder/.cabal/logs/QuickCheck-GenT-0.1.2.log ):
cabal: Entering directory '/tmp/cabal-tmp-5935/QuickCheck-GenT-0.1.2'
Configuring QuickCheck-GenT-0.1.2...
Building QuickCheck-GenT-0.1.2...
Preprocessing library QuickCheck-GenT-0.1.2...
[1 of 2] Compiling QuickCheck.GenT.Prelude ( src/QuickCheck/GenT/Prelude.hs, dist/build/QuickCheck/GenT/Prelude.o )

src/QuickCheck/GenT/Prelude.hs:4:5: error:
    Ambiguous occurrence ‘traceM’
    It could refer to either ‘Exports.traceM’,
                             imported from ‘Debug.Trace’ at src/QuickCheck/GenT/Prelude.hs:41:1-29
                          or ‘QuickCheck.GenT.Prelude.traceM’,
                             defined at src/QuickCheck/GenT/Prelude.hs:55:1
cabal: Leaving directory '/tmp/cabal-tmp-5935/QuickCheck-GenT-0.1.2'
cabal: Error: some packages failed to install:
QuickCheck-GenT-0.1.2 failed during the building phase. The exception was:
ExitFailure 1