Resolving dependencies...
Configuring curl-1.3.8...
Configuring mtl-2.2.1...
Building mtl-2.2.1...
Building curl-1.3.8...
Installed mtl-2.2.1
Configuring old-locale-1.0.0.7...
Building old-locale-1.0.0.7...
Configuring readline-1.0.3.0...
Installed old-locale-1.0.0.7
Configuring syb-0.6...
Installed curl-1.3.8
Building readline-1.0.3.0...
Building syb-0.6...
Configuring text-1.2.2.1...
Installed readline-1.0.3.0
Installed syb-0.6
Building text-1.2.2.1...
Installed text-1.2.2.1
Configuring xml-1.3.14...
Configuring parsec-3.1.11...
Building parsec-3.1.11...
Building xml-1.3.14...
Installed xml-1.3.14
Installed parsec-3.1.11
Configuring json-0.9.1...
Building json-0.9.1...
Installed json-0.9.1
Downloading twitter-0.1.1...
Configuring twitter-0.1.1...
Building twitter-0.1.1...
Failed to install twitter-0.1.1
Build log ( /home/builder/.cabal/logs/twitter-0.1.1.log ):
cabal: Entering directory '/tmp/cabal-tmp-8983/twitter-0.1.1'
Configuring twitter-0.1.1...
Building twitter-0.1.1...
Preprocessing executable 'twitter' for twitter-0.1.1...
[1 of 5] Compiling Twitter.Client   ( Twitter/Client.hs, dist/build/twitter/twitter-tmp/Twitter/Client.o )

Twitter/Client.hs:40:55: error:
    Ambiguous occurrence ‘defaultTimeLocale’
    It could refer to either ‘Data.Time.Format.defaultTimeLocale’,
                             imported from ‘Data.Time.Format’ at Twitter/Client.hs:6:1-23
                             (and originally defined in ‘time-1.6.0.1:Data.Time.Format.Locale’)
                          or ‘System.Locale.defaultTimeLocale’,
                             imported from ‘System.Locale’ at Twitter/Client.hs:9:1-20
cabal: Leaving directory '/tmp/cabal-tmp-8983/twitter-0.1.1'
cabal: Error: some packages failed to install:
twitter-0.1.1 failed during the building phase. The exception was:
ExitFailure 1