I was trying to install/compile Haddock 0.1 in my computer (Windows98 + Cygwin, GHC-5.02.3), but I got the following error message:

You must install the version of Perl shipped with GHC (or a compatible one) in /bin.

I though I already had a version of Perl in my computer, since HOpenGL (which uses it) was compiled succesfully. My /bin dir also contains a file called perl.exe and another dir called Perl (which contains perl.exe too).

This works for me, but I'm not a Cygwin/Windows expert so I'm not sure what the canonical answer should be. On my system I have the Cygwin perl.exe in /cygwin/bin, and this is also /bin under cygwin, because by default Cygwin seems to want to mount /cygwin as /. I've just successfully build Haddock on WinXP with a fresh install of Cygwin, GHC 5.02.3, and surprisingly little fiddling about (I think I had to set PATH to include GHC, but that was it). Cheers, Simon