Resolving dependencies...
Configuring old-locale-1.0.0.7...
Configuring mtl-2.2.1...
Building old-locale-1.0.0.7...
Building mtl-2.2.1...
Configuring text-1.2.2.1...
Installed old-locale-1.0.0.7
Building text-1.2.2.1...
Installed mtl-2.2.1
Installed text-1.2.2.1
Downloading data-extra-2.5.1...
Configuring data-extra-2.5.1...
Building data-extra-2.5.1...
Failed to install data-extra-2.5.1
Build log ( /home/builder/.cabal/logs/data-extra-2.5.1.log ):
cabal: Entering directory '/tmp/cabal-tmp-31855/data-extra-2.5.1'
Configuring data-extra-2.5.1...
Building data-extra-2.5.1...
Preprocessing library data-extra-2.5.1...
[ 1 of 11] Compiling Data.Tuple.Extra ( src/Data/Tuple/Extra.hs, dist/build/Data/Tuple/Extra.o )
[ 2 of 11] Compiling Data.Time.Extra  ( src/Data/Time/Extra.hs, dist/build/Data/Time/Extra.o )

src/Data/Time/Extra.hs:16:29: error:
    Ambiguous occurrence ‘defaultTimeLocale’
    It could refer to either ‘Data.Time.defaultTimeLocale’,
                             imported from ‘Data.Time’ at src/Data/Time/Extra.hs:10:1-16
                             (and originally defined in ‘time-1.6.0.1:Data.Time.Format.Locale’)
                          or ‘System.Locale.defaultTimeLocale’,
                             imported from ‘System.Locale’ at src/Data/Time/Extra.hs:11:1-20

src/Data/Time/Extra.hs:20:30: error:
    Ambiguous occurrence ‘defaultTimeLocale’
    It could refer to either ‘Data.Time.defaultTimeLocale’,
                             imported from ‘Data.Time’ at src/Data/Time/Extra.hs:10:1-16
                             (and originally defined in ‘time-1.6.0.1:Data.Time.Format.Locale’)
                          or ‘System.Locale.defaultTimeLocale’,
                             imported from ‘System.Locale’ at src/Data/Time/Extra.hs:11:1-20

src/Data/Time/Extra.hs:24:28: error:
    Ambiguous occurrence ‘defaultTimeLocale’
    It could refer to either ‘Data.Time.defaultTimeLocale’,
                             imported from ‘Data.Time’ at src/Data/Time/Extra.hs:10:1-16
                             (and originally defined in ‘time-1.6.0.1:Data.Time.Format.Locale’)
                          or ‘System.Locale.defaultTimeLocale’,
                             imported from ‘System.Locale’ at src/Data/Time/Extra.hs:11:1-20
cabal: Leaving directory '/tmp/cabal-tmp-31855/data-extra-2.5.1'
cabal: Error: some packages failed to install:
data-extra-2.5.1 failed during the building phase. The exception was:
ExitFailure 1