Error Installing haddock on Leopard snow

[biobrain@…]

sudo port install haddock ---> Computing dependencies for haddock ---> Fetching gmp ---> Attempting to fetch gmp-4.3.1.tar.bz2 from ​http://mirrors.ibiblio.org/pub/mirrors/gnu/ftp/gnu/gmp ---> Verifying checksum(s) for gmp ---> Extracting gmp ---> Applying patches to gmp ---> Configuring gmp ---> Building gmp ---> Staging gmp into destroot ---> Installing gmp @4.3.1_1 ---> Activating gmp @4.3.1_1 ---> Cleaning gmp ---> Fetching ghc Error: Target org.macports.fetch returned: ghc is not yet supported on Mac OS X 10.6.x (SnowLeopard) Error: The following dependencies failed to build: ghc hs-ghc-paths Error: Status 1 encountered during processing.