xcodebuild -scheme Example-Package -derivedDataPath build test で試してる2021-06-06 19:47:34.100871-0700 swiftc[12779:1790755] Failed to open macho file at /Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/swiftc for reading: Too many levels of symbolic links Apple Swift version 5.4 (swiftlang-1205.0.26.9 clang-1205.0.19.55) でますね