I finally installed cabal-install in windows.. I had a copy of sh.exe for
windows time ago so I could use bootstrap. The only additional thing needed
is wget(http://users.ugent.be/~bpuype/wget/).
finally I moved the resulting cabal.exe to ghc/bin
2009/1/19 Duncan Coutts
The problem with Windows can be solved once and for all when CygWIN will be considered for Windows instead of MinGW. Is that possible?
The standard Windows build of GHC does not use Cygwin. So all the programs built with GHC (like cabal) are native Windows programs and do not understand Cygwin paths etc.
If you want to build GHC for Cygwin then there is quite a bit of work for you to do to update GHC to build that way.
I get the general impression that most users would prefer not to have to install Cygwin or MinGW at all.
Duncan