I am using anaconda as below:
(base) C:\\Users\\xxx>conda info
active environment : base
active env location : C:\\Users\\xxx\\Documents\\ANACON
I ran into the same problem and I couldn't find a solution, but I did find a workaround. If you create an env and activate that env and then do the install, it seems to work just fine. If you don't need a lot of libraries I would try that.
Commands are:
conda create --name myenv
conda activate myenv