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1Swiftpm looks for the Swift stdlib relative to the swift compiler, but that's a 2wrapper in our case. It wants to add the stdlib to the rpath, which is 3necessary for back-deployment of some features. 4 5--- a/Sources/PackageModel/Toolchain.swift 6+++ b/Sources/PackageModel/Toolchain.swift 7@@ -53,12 +53,18 @@ extension Toolchain { 8 9 public var macosSwiftStdlib: AbsolutePath { 10 get throws { 11+ if swiftCompilerPath.pathString.starts(with: "@storeDir@") { 12+ return AbsolutePath("@swiftLib@/lib/swift/macosx") 13+ } 14 return try AbsolutePath(validating: "../../lib/swift/macosx", relativeTo: resolveSymlinks(swiftCompilerPath)) 15 } 16 } 17 18 public var toolchainLibDir: AbsolutePath { 19 get throws { 20+ if swiftCompilerPath.pathString.starts(with: "@storeDir@") { 21+ return AbsolutePath("@swiftLib@/lib") 22+ } 23 // FIXME: Not sure if it's better to base this off of Swift compiler or our own binary. 24 return try AbsolutePath(validating: "../../lib", relativeTo: resolveSymlinks(swiftCompilerPath)) 25 }