diff --git a/core/includes/install.inc b/core/includes/install.inc
index 77e0b70..9c83e2d 100644
--- a/core/includes/install.inc
+++ b/core/includes/install.inc
@@ -446,7 +446,9 @@ function _drupal_rewrite_settings_dump($variable, $variable_name) {
  *   into settings.php.
  */
 function _drupal_rewrite_settings_dump_one(\stdClass $variable, $prefix = '', $suffix = '') {
-  $return = $prefix . var_export($variable->value, TRUE) . ';';
+  $export = !isset($variable->export) || !empty($variable->export);
+  $value = $export ? var_export($variable->value, TRUE) : $variable->value;
+  $return = $prefix . $value . ';';
   if (!empty($variable->comment)) {
     $return .= ' // ' . $variable->comment;
   }
diff --git a/core/lib/Drupal/Core/Installer/Form/SiteSettingsForm.php b/core/lib/Drupal/Core/Installer/Form/SiteSettingsForm.php
index 6a71db4..aca8973 100644
--- a/core/lib/Drupal/Core/Installer/Form/SiteSettingsForm.php
+++ b/core/lib/Drupal/Core/Installer/Form/SiteSettingsForm.php
@@ -178,6 +178,7 @@ public function submitForm(array &$form, FormStateInterface $form_state) {
     );
     $settings['settings']['container_yamls'][0] = (object) array(
       'value'    => "__DIR__ . '/services.yml'",
+      'export'   => FALSE,
       'required' => TRUE,
     );
     // Remember the profile which was used.