MacOS installer thinks that the root of my drive isn't the root of a drive

Never mind, I have garbage reading comprehension.

Trying to install on MacOS. I have a drive mounted at /Volumes/WarpDrive. However I’m stuck at this error:


This is unusual because this is the standard mounting point for any drive. Is this a bug, or am I doing something wrong? I have given the app full disk access, so it should have no issue using this directory.