I updated to Unity 2020.2.1f1 today and now I can see the nested asmdef for PackageTools.
I was able to add it but there was a new error for the MonoBehaviourGizmos. I found that in the ALINE asmdef and added that as well and now things compile.
Here’s a picture of the asmdef for my project in case this helps anyone else:
Thanks for this! I couldn’t find the Drawing file.
@aron_granberg this is a little unintuitive, I tried to find any mention of it in the documentation and couldn’t seem to. Is this a surprise effect on games using Assembly Definition files?