XCode reporting Inferno Package import issue

[raminf]

Running XCode 15.4 on Sonoma 14.5.

Tried to add the Inferno Package, and it says "Package Resolution Failed. Inferno could not be resolved."

Puts up a screen that reads:

• Updating from https://github.com/twostraws/Inferno
• the package manifest at '/Package.swift' cannot be accessed (/Package.swift doesn't exist in file system)
• unexpectedly did not find the new dependency in the package graph: sourceControl(identity: inferno, location: SwiftPM.SPMPackageDependency.SourceControl)

Have also tried it in XCode 16 beta. Same issue.

Edit: tried cloning Inferno from github and adding it as a local repo and that worked. Can't use it in production, but can at least use for experiments.