diff --git a/lib/classes/Setup/Registry.php b/lib/classes/Setup/Registry.php
index 6fbc43dbef..c54191eb11 100644
--- a/lib/classes/Setup/Registry.php
+++ b/lib/classes/Setup/Registry.php
@@ -20,6 +20,11 @@ class Setup_Registry implements registryInterface
 {
     protected $datas = array();
 
+    public function __construct()
+    {
+        $this->datas['GV_RootPath'] = realpath(__DIR__ . '/../../..') . '/';
+    }
+
     public function get($key, $defaultvalue = null)
     {
         return isset($this->datas[$key]) ? $this->datas[$key] : $defaultvalue;
diff --git a/lib/classes/appbox.php b/lib/classes/appbox.php
index ad7d35360b..43b7c42912 100644
--- a/lib/classes/appbox.php
+++ b/lib/classes/appbox.php
@@ -10,11 +10,11 @@
  */
 
 use Alchemy\Phrasea\Application;
-use Alchemy\Phrasea\Core\Version;
 use MediaAlchemyst\Alchemyst;
 use MediaAlchemyst\Specification\Image as ImageSpecification;
 use Symfony\Component\Filesystem\Filesystem;
 use Symfony\Component\HttpFoundation\File\File as SymfoFile;
+use Symfony\Component\Finder\Finder;
 
 /**
  *
@@ -349,11 +349,14 @@ class appbox extends base
          */
         $upgrader->set_current_message(_('Purging directories'));
 
-        $finder = new Symfony\Component\Finder\Finder();
+        $finder = new Finder();
         $finder->in(array(
             $this->app['phraseanet.registry']->get('GV_RootPath') . 'tmp/cache_minify/',
-            $this->app['phraseanet.registry']->get('GV_RootPath') . 'tmp/cache_minify/',
-        ))->ignoreVCS(true)->ignoreDotFiles(true);
+            $this->app['phraseanet.registry']->get('GV_RootPath') . 'tmp/cache_twig/',
+        ))
+            ->depth(0)
+            ->ignoreVCS(true)
+            ->ignoreDotFiles(true);
 
         foreach ($finder as $file) {
             $app['filesystem']->remove($file);