Resolving dependencies... Configuring old-locale-1.0.0.7... Building old-locale-1.0.0.7... Preprocessing library old-locale-1.0.0.7... [1 of 1] Compiling System.Locale ( System/Locale.hs, dist/build/System/Locale.o ) In-place registering old-locale-1.0.0.7... Running Haddock for old-locale-1.0.0.7... Running hscolour for old-locale-1.0.0.7... Preprocessing library old-locale-1.0.0.7... Preprocessing library old-locale-1.0.0.7... Haddock coverage: 60% ( 3 / 5) in 'System.Locale' Missing documentation for: TimeLocale (System/Locale.hs:36) defaultTimeLocale (System/Locale.hs:49) Documentation created: dist/doc/html/old-locale/index.html, dist/doc/html/old-locale/old-locale.txt Creating package registration file: /tmp/pkgConf-old-locale-1.0.0278722862233665123.7 Installing library in /home/builder/hackage-server/build-cache/tmp-install/lib/x86_64-linux-ghc-7.10.2/old-locale-1.0.0.7-D6X1KPq5Sui5XjrHMwvFwK Registering old-locale-1.0.0.7... Installed old-locale-1.0.0.7 Configuring wtk-0.2... Building wtk-0.2... Preprocessing library wtk-0.2... [1 of 4] Compiling Text.PrettyShow ( Text/PrettyShow.hs, dist/build/Text/PrettyShow.o ) Text/PrettyShow.hs:93:45: Ambiguous occurrence ‘defaultTimeLocale’ It could refer to either ‘Data.Time.defaultTimeLocale’, imported from ‘Data.Time’ at Text/PrettyShow.hs:26:1-16 (and originally defined in ‘time-1.5.0.1:Data.Time.Format.Locale’) or ‘System.Locale.defaultTimeLocale’, imported from ‘System.Locale’ at Text/PrettyShow.hs:27:23-39 Text/PrettyShow.hs:94:45: Ambiguous occurrence ‘defaultTimeLocale’ It could refer to either ‘Data.Time.defaultTimeLocale’, imported from ‘Data.Time’ at Text/PrettyShow.hs:26:1-16 (and originally defined in ‘time-1.5.0.1:Data.Time.Format.Locale’) or ‘System.Locale.defaultTimeLocale’, imported from ‘System.Locale’ at Text/PrettyShow.hs:27:23-39 Failed to install wtk-0.2 cabal: Error: some packages failed to install: wtk-0.2 failed during the building phase. The exception was: ExitFailure 1