Fix compiler diff for unsafe

Sources/Packages/Sources/SecretAgentKit/SocketController.swift

@@ -149,14 +149,7 @@ private extension SocketPort {
 
     convenience init(path: String) {
         var addr = sockaddr_un()
-
+        let length = addr.setPath(path)
-        let length = unsafe withUnsafeMutablePointer(to: &addr.sun_path.0) { pointer in
-            unsafe path.withCString { cstring in
-                let len = unsafe strlen(cstring)
-                unsafe strncpy(pointer, cstring, len)
-                return len
-            }
-        }
         // This doesn't seem to be _strictly_ neccessary with SocketPort.
         // but just for good form.
         addr.sun_family = sa_family_t(AF_UNIX)
@@ -169,6 +162,30 @@ private extension SocketPort {
 
 }
 
+private extension sockaddr_un {
+
+    mutating func setPath(_ path: String) -> Int {
+#if compiler(<6.4)
+        unsafe withUnsafeMutablePointer(to: &addr.sun_path.0) { pointer in
+            unsafe path.withCString { cstring in
+                let len = unsafe strlen(cstring)
+                unsafe strncpy(pointer, cstring, len)
+                return len
+            }
+        }
+#else
+        withUnsafeMutablePointer(to: &self.sun_path.0) { pointer in
+            path.withCString { cstring in
+                let len = unsafe strlen(cstring)
+                unsafe strncpy(pointer, cstring, len)
+                return len
+            }
+        }
+#endif
+    }
+
+}
+
 // Changes the header from `UnsafeMutablePointer<UnsafeMutablePointer<Int32>?>?` -> `UnsafeMutablePointer<UnsafeMutablePointer<Int32>?>!`
 @_silgen_name("launch_activate_socket")
 func launch_activate_socket(_ name: UnsafePointer<CChar>, _ fds: UnsafeMutablePointer<UnsafeMutablePointer<Int32>?>!, _ cnt: UnsafeMutablePointer<Int>!) -> Int32