There was some people having issues build using Xcode 12 beta 3. You can check out this thread, maybe there is something there https://forums.swift.org/t/compiling-swift-with-xcode-option-on-xcode-12-beta-3/
There was some people having issues build using Xcode 12 beta 3. You can check out this thread, maybe there is something there https://forums.swift.org/t/compiling-swift-with-xcode-option-on-xcode-12-beta-3/