I created a bug to track the macOS build failure, #890. It's probably a failure to find the Mac version of the Narcissus library (this is not related to your changes, it started happening recently, and I haven't had a chance to look into it yet).

The single windows failure is an example of #810, which again you can ignore (it is going to be tricky to track that one down, since it involves a race condition somewhere, which should be impossible given how ClassGraph was built, but apparently is not...).