Unable to use entity_ui_form_submit_build_entity on Node Entity_metadatawrapper

I was having issue with the following code when building an entity from form data.

$node = entity_ui_form_submit_build_entity($form, $form_state);

Here's the code I used that worked

$node = $form['#entity'];
      node_submit($node);

      $node->job_listing_node_form = TRUE;

      field_attach_submit('node', $node, $form, $form_state);

      $wrapper = entity_metadata_wrapper('node', $node);