See https://www.drupal.org/node/1613424 for issue

d8-config-sync-site-install-huge-hack.diff

diff --git a/core/lib/Drupal/Core/Config/ConfigImporter.php b/core/lib/Drupal/Core/Config/ConfigImporter.php
index c7246be..01c413e 100644
--- a/core/lib/Drupal/Core/Config/ConfigImporter.php
+++ b/core/lib/Drupal/Core/Config/ConfigImporter.php
@@ -514,7 +514,12 @@ public function initialize() {
     $this->createExtensionChangelist();

     // Ensure that the changes have been validated.
-    $this->validate();
+
+    // DO NOT ensure that the changes are valide.
+    // The only place where UUID collision is check is in validate()
+    // removing this lets the name take over without any issues (aka issues that we have yet to find).
+    // This is o.k. for now since it'll lets us do a site-install and then start from point x.
+    // $this->validate();

     if (!$this->lock->acquire(static::LOCK_NAME)) {
       // Another process is synchronizing configuration.