[Haskell-beginners] Installing packages

[Tymur Porkuian]

I'm trying to install wxcore-0.11.0 using Cabal. I've downloaded it
from http://hackage.haskell.org/cgi-bin/hackage-scripts/package/wxcore-0.11.0,
unpacked and tried to follow instructions from
http://haskell.org/haskellwiki/Cabal/How_to_install_a_Cabal_package,
but this is what I'm getting:

D:\libraries\wxcore-0.11.0>runhaskell Setup configure
Setup: sh: runGenProcess: does not exist (No such file or directory)

What does this mean?