Resolving dependencies...
Configuring tar-0.5.0.3...
Configuring mtl-2.2.1...
Building mtl-2.2.1...
Building tar-0.5.0.3...
Configuring utf8-string-1.0.1.1...
Installed mtl-2.2.1
Building utf8-string-1.0.1.1...
Installed tar-0.5.0.3
Installed utf8-string-1.0.1.1
Downloading cabal-db-0.1.0...
Configuring cabal-db-0.1.0...
Building cabal-db-0.1.0...
Failed to install cabal-db-0.1.0
Build log ( /home/builder/.cabal/logs/cabal-db-0.1.0.log ):
cabal: Entering directory '/tmp/cabal-tmp-29470/cabal-db-0.1.0'
Configuring cabal-db-0.1.0...
Building cabal-db-0.1.0...
Preprocessing executable 'cabal-db' for cabal-db-0.1.0...
[1 of 1] Compiling Main             ( Src/Main.hs, dist/build/cabal-db/cabal-db-tmp/Main.o )

Src/Main.hs:238:23: error:
    Ambiguous occurrence ‘unPackageName’
    It could refer to either ‘Distribution.Package.unPackageName’,
                             imported from ‘Distribution.Package’ at Src/Main.hs:6:1-27
                          or ‘Main.unPackageName’, defined at Src/Main.hs:59:1

Src/Main.hs:239:42: error:
    Ambiguous occurrence ‘unPackageName’
    It could refer to either ‘Distribution.Package.unPackageName’,
                             imported from ‘Distribution.Package’ at Src/Main.hs:6:1-27
                          or ‘Main.unPackageName’, defined at Src/Main.hs:59:1

Src/Main.hs:253:65: error:
    Ambiguous occurrence ‘unPackageName’
    It could refer to either ‘Distribution.Package.unPackageName’,
                             imported from ‘Distribution.Package’ at Src/Main.hs:6:1-27
                          or ‘Main.unPackageName’, defined at Src/Main.hs:59:1

Src/Main.hs:264:23: error:
    Ambiguous occurrence ‘unPackageName’
    It could refer to either ‘Distribution.Package.unPackageName’,
                             imported from ‘Distribution.Package’ at Src/Main.hs:6:1-27
                          or ‘Main.unPackageName’, defined at Src/Main.hs:59:1
cabal: Leaving directory '/tmp/cabal-tmp-29470/cabal-db-0.1.0'
cabal: Error: some packages failed to install:
cabal-db-0.1.0 failed during the building phase. The exception was:
ExitFailure 1