diff -u b/core/includes/install.inc b/core/includes/install.inc
--- b/core/includes/install.inc
+++ b/core/includes/install.inc
@@ -1063,9 +1063,6 @@
  *       Drupal's default installer theme.
  *     - finish_url: A destination to visit after the installation of the
  *       distribution is finished
- * - base profile: The shortname of the base installation profile. Existence of
- *   this key denotes that the installation profile depends on a parent
- *   installation profile.
  *
  * Note that this function does an expensive file system scan to get info file
  * information for dependencies. If you only need information from the info
@@ -1079,6 +1076,9 @@
  *       Drupal's default installer theme.
  *     - finish_url: A destination to visit after the installation of the
  *       distribution is finished
+ * - base profile: The shortname of the base installation profile. Existence of
+ *   this key denotes that the installation profile depends on a parent
+ *   installation profile.
  *
  * Note that this function does an expensive file system scan to get info file
  * information for dependencies. If you only need information from the info
@@ -1105,8 +1105,8 @@
       'config_install_path' => NULL,
     ];
     $profile_path = drupal_get_path('profile', $profile);
-    $info = \Drupal::service('extension.list.profile')->getExtensionInfo($profile);
-    $ancestors = \Drupal::service('extension.list.profile')->getAncestors($profile);
+    $info = \Drupal::service('info_parser')->parse("$profile_path/$profile.info.yml");
+    $info += $defaults;
 
     $dependency_name_function = function ($dependency) {
       return Dependency::createFromString($dependency)->getName();
@@ -1118,8 +1118,8 @@
       'config_install_path' => NULL,
     ];
     $profile_path = drupal_get_path('profile', $profile);
-    $info = \Drupal::service('info_parser')->parse("$profile_path/$profile.info.yml");
-    $info += $defaults;
+    $info = \Drupal::service('extension.list.profile')->getExtensionInfo($profile);
+    $ancestors = \Drupal::service('extension.list.profile')->getAncestors($profile);
 
     $dependency_name_function = function ($dependency) {
       return Dependency::createFromString($dependency)->getName();
@@ -1127,9 +1127,6 @@
     // remove any duplicates.
     $info['install'] = array_unique(array_merge($info['install'], $required, $info['dependencies'], $locale));
 
-    // Remove the base profiles from the install list.
-    $info['install'] = array_diff($info['install'], array_keys($ancestors));
-
     // If the profile has a config/sync directory use that to install drupal.
     if (is_dir($profile_path . '/config/sync')) {
       $info['config_install_path'] = $profile_path . '/config/sync';
@@ -1143,6 +1140,9 @@
     // remove any duplicates.
     $info['install'] = array_unique(array_merge($info['install'], $required, $info['dependencies'], $locale));
 
+    // Remove the base profiles from the install list.
+    $info['install'] = array_diff($info['install'], array_keys($ancestors));
+
     // If the profile has a config/sync directory use that to install drupal.
     if (is_dir($profile_path . '/config/sync')) {
       $info['config_install_path'] = $profile_path . '/config/sync';
diff -u b/core/lib/Drupal/Core/Extension/ModuleInstaller.php b/core/lib/Drupal/Core/Extension/ModuleInstaller.php
--- b/core/lib/Drupal/Core/Extension/ModuleInstaller.php
+++ b/core/lib/Drupal/Core/Extension/ModuleInstaller.php
@@ -387,7 +387,7 @@
             return FALSE;
           }
 
-          // Skip already uninstalled modules and dependencies of profiles.
+          // Skip already uninstalled modules.
           if (isset($installed_modules[$dependent]) && !isset($module_list[$dependent])) {
             $module_list[$dependent] = $dependent;
           }
@@ -402,7 +402,7 @@
             return FALSE;
           }
 
-          // Skip already uninstalled modules.
+          // Skip already uninstalled modules and dependencies of profiles.
           if (isset($installed_modules[$dependent]) && !isset($module_list[$dependent])) {
             $module_list[$dependent] = $dependent;
           }
only in patch2:
unchanged:
--- a/core/lib/Drupal/Core/Config/ConfigInstaller.php
+++ b/core/lib/Drupal/Core/Config/ConfigInstaller.php
@@ -6,6 +6,7 @@
 use Drupal\Core\Config\Entity\ConfigDependencyManager;
 use Drupal\Core\Installer\InstallerKernel;
 use Symfony\Contracts\EventDispatcher\EventDispatcherInterface;
+use Drupal\Core\Extension\ProfileExtensionList;
 
 class ConfigInstaller implements ConfigInstallerInterface {
 
@@ -51,6 +52,13 @@ class ConfigInstaller implements ConfigInstallerInterface {
    */
   protected $sourceStorage;
 
+  /**
+   * The profile list.
+   *
+   * @var \Drupal\Core\Extension\ProfileExtensionList
+   */
+  protected $profileList;
+
   /**
    * Is configuration being created as part of a configuration sync.
    *
@@ -80,14 +88,17 @@ class ConfigInstaller implements ConfigInstallerInterface {
    *   The event dispatcher.
    * @param string $install_profile
    *   The name of the currently active installation profile.
+   * @param \Drupal\Core\Extension\ProfileExtensionList|null $profile_list
+   *   (optional) The profile list.
    */
-  public function __construct(ConfigFactoryInterface $config_factory, StorageInterface $active_storage, TypedConfigManagerInterface $typed_config, ConfigManagerInterface $config_manager, EventDispatcherInterface $event_dispatcher, $install_profile) {
+  public function __construct(ConfigFactoryInterface $config_factory, StorageInterface $active_storage, TypedConfigManagerInterface $typed_config, ConfigManagerInterface $config_manager, EventDispatcherInterface $event_dispatcher, $install_profile, ProfileExtensionList $profile_list = NULL) {
     $this->configFactory = $config_factory;
     $this->activeStorages[$active_storage->getCollectionName()] = $active_storage;
     $this->typedConfig = $typed_config;
     $this->configManager = $config_manager;
     $this->eventDispatcher = $event_dispatcher;
     $this->installProfile = $install_profile;
+    $this->profileList = $profile_list ?: \Drupal::service('extension.list.profile');
   }
 
   /**
@@ -513,7 +524,8 @@ public function checkConfigurationToInstall($type, $name) {
 
     // Install profiles can not have config clashes. Configuration that
     // has the same name as a module's configuration will be used instead.
-    if ($name != $this->drupalGetProfile()) {
+    $profiles = $this->profileList->getAncestors($this->installProfile);
+    if (!isset($profiles[$name])) {
       // Throw an exception if the module being installed contains configuration
       // that already exists. Additionally, can not continue installing more
       // modules because those may depend on the current module being installed.