template_preprocess_install_page

template_preprocess_install_page(&$variables)

function template_preprocess_install_page(&$variables) {
  template_preprocess_maintenance_page($variables);

  // Override the site name that is displayed on the page, since Drupal is
  // still in the process of being installed.
  $distribution_name = drupal_install_profile_distribution_name();
  $variables['site_name'] = $distribution_name;
  $variables['site_version'] = drupal_install_profile_distribution_version();
}