Resolving dependencies...
Configuring mtl-2.2.1...
Configuring tar-0.5.0.3...
Building tar-0.5.0.3...
Building mtl-2.2.1...
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-0.1.1...
Configuring cabal-db-0.1.1...
Building cabal-db-0.1.1...
Failed to install cabal-db-0.1.1
Build log ( /home/builder/.cabal/logs/cabal-db-0.1.1.log ):
cabal: Entering directory '/tmp/cabal-tmp-19687/cabal-db-0.1.1'
Configuring cabal-db-0.1.1...
Building cabal-db-0.1.1...
Preprocessing executable 'cabal-db' for cabal-db-0.1.1...
[1 of 1] Compiling Main             ( Src/Main.hs, dist/build/cabal-db/cabal-db-tmp/Main.o )

Src/Main.hs:242:23: 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:63:1

Src/Main.hs:243:42: 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:63:1

Src/Main.hs:257:65: 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:63:1

Src/Main.hs:268:23: 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:63:1
cabal: Leaving directory '/tmp/cabal-tmp-19687/cabal-db-0.1.1'
cabal: Error: some packages failed to install:
cabal-db-0.1.1 failed during the building phase. The exception was:
ExitFailure 1