How do I access update.php using nginx? I would like to use Drupal 8 (beta) with nginx. It works correctly, except update.php. It doesn't find it.

After analysing .htaccess (which is not processed by nginx) I realized that there is no real update.php file; it is served by index.php.

Does anyone have a working nginx configuration (with php5-fpm) which works with Drupal 8 beta, and that makes also update.php work?
You need to set your nginx config file to rewrite 404 error to index.php

Just added this:

error_page 404 = @rewrite;
location @rewrite { 
  rewrite ^ /index.php;
}