*** setup configure Reading installed packages... /usr/local/bin/ghc-pkg dump --global -v0 /usr/local/bin/ghc-pkg dump --user -v0 /usr/local/bin/ghc --print-libdir creating dist/setup creating dist creating dist/setup /usr/local/bin/ghc -package Cabal-1.12.0 --make Setup.hs -o dist/setup/setup -odir dist/setup -hidir dist/setup [1 of 1] Compiling Main ( Setup.hs, dist/setup/Main.o ) Setup.hs:2:1: Warning: In the use of `runTests' (imported from Distribution.Simple, but defined in Distribution.Simple.UserHooks): Deprecated: "Please use the new testing interface instead!" Linking dist/setup/setup ... dist/setup/setup configure --ghc --user --prefix=/usr/local/tmp/archive/install --haddock-option=--use-contents=/package/WebBits-2.1 --haddock-option=--built-in-themes --verbose Configuring WebBits-2.1... Dependency base ==4.*: using base-4.4.1.0 Dependency containers >=0.1: using containers-0.4.1.0 Dependency mtl >=1.1.0.1: using mtl-2.0.1.0 Dependency parsec <3.2.0: using parsec-3.1.2 Dependency pretty >=0.1: using pretty-1.1.0.0 Dependency syb >=0.1: using syb-0.3.3 setup: The package WebBits-2.1 requires the following language extensions which are not supported by ghc-7.2.2: Generics