http://people.salixos.org/mimosa/packages/ghc/7.4.2/SLKBUILD
http://ftp.gnu.org/gnu/gmp/gmp-4.3.2.tar.bz2
http://ltsp.mirrors.tds.net/pub/sourceware.org/libffi/libffi-3.0.10.tar.gz
http://www.haskell.org/ghc/dist/7.4.2/ghc-7.4.2-x86_64-unknown-linux.tar.bz2