diff --git a/core/includes/install.core.inc b/core/includes/install.core.inc
index 968192e..81b41c1 100644
--- a/core/includes/install.core.inc
+++ b/core/includes/install.core.inc
@@ -334,7 +334,7 @@ function install_begin_request(&$install_state) {
 
   // Determine whether base system services are ready to operate.
   $install_state['config_verified'] = install_ensure_config_directory(CONFIG_ACTIVE_DIRECTORY) && install_ensure_config_directory(CONFIG_STAGING_DIRECTORY);
-  $install_state['database_verified'] = install_verify_database_settings();
+  $install_state['database_verified'] = install_verify_database_settings($site_path);
   $install_state['settings_verified'] = $install_state['config_verified'] && $install_state['database_verified'];
 
   if ($install_state['settings_verified']) {
@@ -1017,11 +1017,17 @@ function install_verify_completed_task() {
 
 /**
  * Verifies that settings.php specifies a valid database connection.
+ *
+ * @param string $site_path
+ *   The site path.
+ *
+ * @return bool
+ *   TRUE if there are no database errors.
  */
-function install_verify_database_settings() {
+function install_verify_database_settings($site_path) {
   if ($database = Database::getConnectionInfo()) {
     $database = $database['default'];
-    $settings_file = './' . conf_path(FALSE) . '/settings.php';
+    $settings_file = './' . $site_path . '/settings.php';
     $errors = install_database_errors($database, $settings_file);
     if (empty($errors)) {
       return TRUE;
@@ -1821,8 +1827,9 @@ function install_check_translations($langcode, $server_pattern) {
   $readable = FALSE;
   $writable = FALSE;
   // @todo: Make this configurable.
-  $files_directory = conf_path() . '/files';
-  $translations_directory = conf_path() . '/files/translations';
+  $conf_path = \Drupal::service('kernel')->getSitePath();
+  $files_directory =  $conf_path . '/files';
+  $translations_directory = $conf_path . '/files/translations';
   $translations_directory_exists = FALSE;
   $translation_available = FALSE;
   $online = FALSE;
@@ -2000,7 +2007,7 @@ function install_check_requirements($install_state) {
   foreach ($default_files as $default_file_info) {
     $readable = FALSE;
     $writable = FALSE;
-    $conf_path = './' . conf_path(FALSE);
+    $conf_path = './' . \Drupal::service('kernel')->getSitePath();
     $file = $conf_path . "/{$default_file_info['file']}";
     $default_file = "./sites/default/{$default_file_info['file_default']}";
     $exists = FALSE;