Updating.md

@@ -260,7 +260,11 @@ If you have done that, creating the update responses is very easy, just run this
 ./update_responses
 ```
 
-When it is done, copy the content of the `htdocs` directory to the URL you provided to the build (e.g., `~/public_html/update_3`).
+When it is done, copy the content of the `htdocs` directory to the URL you provided to the build (e.g., `~/public_html/update_3`):
+
+```shell
+cp -r htdocs/nightly ~/public_html/update_3/
+```
 
 At this point, Firefox should find the update automatically, download it, and apply it.