diff --git a/bin/composer b/bin/composer
index 94c5c19b2..030566656 100755
--- a/bin/composer
+++ b/bin/composer
@@ -12,11 +12,7 @@ use Composer\Console\Application as ComposerApplication;
 
 // initialize repository manager
 $rm = new Repository\RepositoryManager();
-$localRepository = new Repository\WrapperRepository(array(
-    new Repository\ArrayRepository('.composer/installed.json'),
-    new Repository\PlatformRepository(),
-));
-$rm->setLocalRepository($localRepository);
+$rm->setLocalRepository(new Repository\PlatformRepository(new Repository\FilesystemRepository('.composer/installed.json')));
 $rm->setRepository('Packagist', new Repository\ComposerRepository('http://packagist.org'));
 
 // initialize download manager
diff --git a/src/Composer/Repository/PlatformRepository.php b/src/Composer/Repository/PlatformRepository.php
index 5a94eee55..a93e32bf0 100644
--- a/src/Composer/Repository/PlatformRepository.php
+++ b/src/Composer/Repository/PlatformRepository.php
@@ -14,13 +14,21 @@ namespace Composer\Repository;
 
 use Composer\Package\MemoryPackage;
 use Composer\Package\BasePackage;
+use Composer\Package\PackageInterface;
 use Composer\Package\Version\VersionParser;
 
 /**
  * @author Jordi Boggiano <j.boggiano@seld.be>
  */
-class PlatformRepository extends ArrayRepository
+class PlatformRepository extends ArrayRepository implements WritableRepositoryInterface
 {
+    private $localRepository;
+
+    public function __construct(WritableRepositoryInterface $localRepository)
+    {
+        $this->localRepository = $localRepository;
+    }
+
     protected function initialize()
     {
         parent::initialize();
@@ -34,7 +42,7 @@ class PlatformRepository extends ArrayRepository
         }
 
         $php = new MemoryPackage('php', $version['version'], $version['type']);
-        $this->addPackage($php);
+        parent::addPackage($php);
 
         foreach (get_loaded_extensions() as $ext) {
             if (in_array($ext, array('standard', 'Core'))) {
@@ -49,7 +57,36 @@ class PlatformRepository extends ArrayRepository
             }
 
             $ext = new MemoryPackage('ext/'.strtolower($ext), $version['version'], $version['type']);
-            $this->addPackage($ext);
+            parent::addPackage($ext);
         }
     }
+
+    public function getPackages()
+    {
+        return array_merge(parent::getPackages(), $this->localRepository->getPackages());
+    }
+
+    /**
+     * {@inheritDoc}
+     */
+    public function addPackage(PackageInterface $package)
+    {
+        $this->localRepository->addPackage($package);
+    }
+
+    /**
+     * {@inheritDoc}
+     */
+    public function removePackage(PackageInterface $package)
+    {
+        $this->localRepository->removePackage($package);
+    }
+
+    /**
+     * {@inheritDoc}
+     */
+    public function write()
+    {
+        $this->localRepository->write();
+    }
 }
diff --git a/src/Composer/Repository/WrapperRepository.php b/src/Composer/Repository/WrapperRepository.php
deleted file mode 100644
index f298cb50b..000000000
--- a/src/Composer/Repository/WrapperRepository.php
+++ /dev/null
@@ -1,64 +0,0 @@
-<?php
-
-/*
- * This file is part of Composer.
- *
- * (c) Nils Adermann <naderman@naderman.de>
- *     Jordi Boggiano <j.boggiano@seld.be>
- *
- * For the full copyright and license information, please view the LICENSE
- * file that was distributed with this source code.
- */
-
-namespace Composer\Repository;
-
-use Composer\Package\PackageInterface;
-
-/**
- * @author Jordi Boggiano <j.boggiano@seld.be>
- */
-class WrapperRepository extends ArrayRepository implements WritableRepositoryInterface
-{
-    private $repositories;
-
-    public function __construct(array $repositories)
-    {
-        $this->repositories = $repositories;
-    }
-
-    protected function initialize()
-    {
-        parent::initialize();
-
-        foreach ($this->repositories as $repo) {
-            foreach ($repo->getPackages() as $package) {
-                $this->packages[] = $package;
-            }
-        }
-    }
-
-    /**
-     * {@inheritDoc}
-     */
-    public function addPackage(PackageInterface $package)
-    {
-        throw new \LogicException('Can not add packages to a wrapper repository');
-    }
-
-    /**
-     * {@inheritDoc}
-     */
-    public function removePackage(PackageInterface $package)
-    {
-        throw new \LogicException('Can not remove packages to a wrapper repository');
-    }
-
-    public function write()
-    {
-        foreach ($this->repositories as $repo) {
-            if ($repo instanceof WritableRepositoryInterface) {
-                $repo->write();
-            }
-        }
-    }
-}