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