Change nuget package location in Linqpad

I am trying to install the Active Directory Authentication Library in Linqpad Nuget manager and I am getting the path/location too long message:

I have attempted to change the install location by adding a setting for repository path to the LinqPad.nuget.config, which now looks like this:

<?xml version="1.0" encoding="utf-8"?><configuration><config><add key="repositoryPath" value="C:\Ng" /></config></configuration>

However, the packages are still being installed in the user/appdata folder.

How can I fix this?