Resolving dependencies... Configuring call-stack-0.1.0... Configuring mtl-2.2.1... Building call-stack-0.1.0... Building mtl-2.2.1... Configuring network-2.6.3.1... Installed call-stack-0.1.0 Configuring text-1.2.2.1... Installed mtl-2.2.1 Building network-2.6.3.1... Building text-1.2.2.1... Installed network-2.6.3.1 Configuring HUnit-1.5.0.0... Building HUnit-1.5.0.0... Installed HUnit-1.5.0.0 Installed text-1.2.2.1 Configuring parsec-3.1.11... Building parsec-3.1.11... Installed parsec-3.1.11 Configuring network-uri-2.6.1.0... Building network-uri-2.6.1.0... Installed network-uri-2.6.1.0 Configuring HTTP-4000.3.4... Building HTTP-4000.3.4... Installed HTTP-4000.3.4 Configuring selenium-0.2.1... Building selenium-0.2.1... Failed to install selenium-0.2.1 Build log ( /home/builder/.cabal/logs/selenium-0.2.1.log ): cabal: Entering directory '/tmp/cabal-tmp-27241/selenium-0.2.1' [1 of 1] Compiling Main ( /tmp/cabal-tmp-27241/selenium-0.2.1/dist/setup/setup.hs, /tmp/cabal-tmp-27241/selenium-0.2.1/dist/setup/Main.o ) Linking /tmp/cabal-tmp-27241/selenium-0.2.1/dist/setup/setup ... Configuring selenium-0.2.1... Warning: No 'build-type' specified. If you do not need a custom Setup.hs or ./configure script then use 'build-type: Simple'. Warning: 'ghc-options: -prof' is not necessary and will lead to problems when used on a library. Use the configure flag --enable-library-profiling and/or --enable-profiling. Building selenium-0.2.1... Preprocessing library selenium-0.2.1... [1 of 5] Compiling Selenium.Pretty ( Selenium/Pretty.hs, dist/build/Selenium/Pretty.o ) Selenium/Pretty.hs:20:1: error: Failed to load interface for ‘Text.PrettyPrint’ It is a member of the hidden package ‘pretty-1.1.3.3’. Perhaps you need to add ‘pretty’ to the build-depends in your .cabal file. Use -v to see a list of the files searched for. cabal: Leaving directory '/tmp/cabal-tmp-27241/selenium-0.2.1' cabal: Error: some packages failed to install: selenium-0.2.1 failed during the building phase. The exception was: ExitFailure 1