Hi I finally got the network library (darcs) building, installing and basically working on Windows with GHC 6.12.1. To do this I set up my environment as follows: 1) Install Cygwin 1.7 (include autoreconf) 2) Install GHC 6.12.1 3) export PATH=/cygdrive/c/ghc/ghc-6.12.1/mingw/bin:$PATH I then did the network steps: 1) Grab network from darcs 2) autoreconf 3) Apply the patch attached, which just changes the .cabal file 4) Change all instances of CALLCONV to stdcall 5) cabal install Please can you apply the attached patch, which should be compatible with Linux/Mac too. I found lots of references to CALLCONV all over the place, but couldn't figure out where it started/ended up - my attempts at #define were rather unsuccessful. Could you please change the logic so Windows gets stdcall as standard? I'm happy to test any patches you come up with. Having a working network library on Windows will be really nice, as it's stopped me upgrading to GHC 6.12.1 for a while now. Thanks, Neil