Adam I have a PR for the Windows documentation now as well and was able to do a build both using Cygwin and WSL using the docs.
Greg, I did run into an issue with sim:nsh with Cygwin that I opened and issue on. Did I do something wrong or do we have a bug to fix in the releases/9.0 branch? https://github.com/apache/incubator-nuttx/issues/886 I think with this I would feel comfortable cutting the 9.0.0-RC1 release tonight if there are no objections. --Brennan