return err
		}

		// support proxyConfig customizations on VMs via annotation in the echo API.
		for k, v := range subset.Annotations {
			if k == "proxy.istio.io/config" {
				if err := patchProxyConfigFile(path.Join(subsetDir, "mesh.yaml"), v); err != nil {
					return fmt.Errorf("failed patching proxyconfig: %v", err)
				}
			}
		}