Prevents a user-visible warning on every compilation:

  ld: warning: directory not found for option '-L.../MacOSX11.0.sdk/usr/lib/swift'

--- a/Sources/SwiftDriver/Jobs/Toolchain+LinkerSupport.swift
+++ b/Sources/SwiftDriver/Jobs/Toolchain+LinkerSupport.swift
@@ -50,7 +50,9 @@ extension Toolchain {
         result.append(sdkPath.appending(components: "System", "iOSSupport", "usr", "lib", "swift"))
       }
 
+      if sdkPath.absolutePath?.pathString.starts(with: "@storeDir@") == false {
       result.append(sdkPath.appending(components: "usr", "lib", "swift"))
+      }
     }
 
     return result