This was posted by @hasali19 in the flutter repo, which was forwarded here, but I couldn't find the same issue here. This is what I see on my machine. Doctor summary (to see all details, run flutter ...
If you want to build manually CNTK from source code on Windows using Visual Studio 2017, this page is for you. If you are looking for any other kind of support to setup a CNTK build environment or ...