From Fedora Project Wiki
GHC and Haskell Platform
GHC has been updated to 6.12.3, and haskell-platform to 2010.2.0.0 stable release.
Some further improvements have been made to ghc-rpm-macros and cabal2spec, including merging the -doc subpackages into -devel.
New packages
xmobar package has been added, and ghc-gtk2hs has been split into separate upstream packages.
Installing
The easiest way to install Haskell support in Fedora is to install the Haskell yum group from Anaconda or YUM.
yum install @haskell