Building on windows

Hi, I've tried to build ghc on windows 10 with msys. I've installed it with stack as said on the guide. In the msys shell, after updating and installing everything I've tried to run `./configure --enable-tarballs-autodownload` and got the following error: configure: loading site script /mingw64/etc/config.site checking for gfind... no checking for find... /usr/bin/find checking for sort... /usr/bin/sort checking for GHC version date... inferred 8.7.20181017 checking for GHC Git commit id... inferred 46f2906d1c6e1fb732a90882487479a2ebf19ca1 checking for ghc... no configure: error: GHC is required. I have the haskell platform installed (8.4.3), yet it can't find GHC and I'm not sure if I missed something from the guide Yotam