Building fails with an internal error: symlinks not supported

[libewa]

When trying to build or resolve package, the process exits with this error:

E:\swift\happyworkwin> swift package resolve
Updating https://github.com/compnerd/swift-win32.git
Updated https://github.com/compnerd/swift-win32.git (0.78s)
error: the package manifest at '\[email protected]' cannot be accessed (InternalError(description: "Internal error. Please file a bug at https://github.com/apple/swift-package-manager/issues with this info. symlinks not supported")) in https://github.com/compnerd/swift-win32.git
E:\swift\happyworkwin>

As the error message says, this is probably due to [email protected] just being a symlink to [email protected]. This seems like it's not needed, as I use Swift 5.9.2 which automatically failed back to the (broken) 5.8 Package.swift.

[compnerd]

This is a user configuration issue - you need to enable symbolic links on your host. SPM already uses symbolic links and requires that they be enabled, so using them here is not really an additional step.