diff --git a/src/Composer/Downloader/DownloadManager.php b/src/Composer/Downloader/DownloadManager.php
index c2e5ee358..d2d003af5 100644
--- a/src/Composer/Downloader/DownloadManager.php
+++ b/src/Composer/Downloader/DownloadManager.php
@@ -94,14 +94,12 @@ class DownloadManager
         if (!($preferSource && $sourceType) && $distType) {
             $downloader = $this->getDownloader($distType);
             $downloader->download(
-                $package, $targetDir,
-                $package->getDistUrl(), $package->getDistSha1Checksum(),
-                $preferSource
+                $targetDir, $package->getDistUrl(), $package->getDistSha1Checksum(), $preferSource
             );
             $package->setInstallationSource('dist');
         } elseif ($sourceType) {
             $downloader = $this->getDownloader($sourceType);
-            $downloader->download($package, $targetDir, $package->getSourceUrl(), $preferSource);
+            $downloader->download($targetDir, $package->getSourceUrl(), null, $preferSource);
             $package->setInstallationSource('source');
         } else {
             throw new \InvalidArgumentException('Package should have dist or source specified');
@@ -137,9 +135,15 @@ class DownloadManager
         $downloader = $this->getDownloader($initialType);
 
         if ($initialType === $targetType) {
-            $downloader->update($initial, $target, $targetDir, $useSource);
+            if (!$useSource) {
+                $downloader->update(
+                    $targetDir, $target->getDistUrl(), $target->getDistSha1Checksum(), $useSource
+                );
+            } else {
+                $downloader->update($targetDir, $target->getSourceUrl(), null, $useSource);
+            }
         } else {
-            $downloader->remove($initial, $targetDir, $useSource);
+            $downloader->remove($targetDir, $useSource);
             $this->download($target, $targetDir, $useSource);
         }
     }
@@ -166,6 +170,6 @@ class DownloadManager
             $downloader = $this->getDownloader($package->getSourceType());
         }
 
-        $downloader->remove($package, $targetDir, $useSource);
+        $downloader->remove($targetDir, $useSource);
     }
 }
diff --git a/src/Composer/Downloader/DownloaderInterface.php b/src/Composer/Downloader/DownloaderInterface.php
index 863d6bd30..eeb18ace7 100644
--- a/src/Composer/Downloader/DownloaderInterface.php
+++ b/src/Composer/Downloader/DownloaderInterface.php
@@ -12,8 +12,6 @@
 
 namespace Composer\Downloader;
 
-use Composer\Package\PackageInterface;
-
 /**
  * Downloader interface.
  *
@@ -24,30 +22,28 @@ interface DownloaderInterface
     /**
      * Downloads specific package into specific folder.
      *
-     * @param   PackageInterface    $package    package instance
-     * @param   string              $path       download path
-     * @param   string              $url        download url
-     * @param   string              $checksum   package checksum (for dists)
-     * @param   Boolean             $useSource  download as source
+     * @param   string  $path       download path
+     * @param   string  $url        download url
+     * @param   string  $checksum   package checksum (for dists)
+     * @param   Boolean $useSource  download as source
      */
-    function download(PackageInterface $package, $path, $url, $checksum = null, $useSource = false);
+    function download($path, $url, $checksum = null, $useSource = false);
 
     /**
      * Updates specific package in specific folder from initial to target version.
      *
-     * @param   PackageInterface    $initial    initial package
-     * @param   PackageInterface    $target     updated package
-     * @param   string              $path       download path
-     * @param   Boolean             $useSource  download as source
+     * @param   string  $path       download path
+     * @param   string  $url        download url
+     * @param   string  $checksum   package checksum (for dists)
+     * @param   Boolean $useSource  download as source
      */
-    function update(PackageInterface $initial, PackageInterface $target, $path, $useSource = false);
+    function update($path, $url, $checksum = null, $useSource = false);
 
     /**
      * Removes specific package from specific folder.
      *
-     * @param   PackageInterface    $package    package instance
-     * @param   string              $path       download path
-     * @param   Boolean             $useSource  download as source
+     * @param   string  $path       download path
+     * @param   Boolean $useSource  download as source
      */
-    function remove(PackageInterface $package, $path, $useSource = false);
+    function remove($path, $useSource = false);
 }
diff --git a/src/Composer/Downloader/GitDownloader.php b/src/Composer/Downloader/GitDownloader.php
index cf732bafd..b09e05d55 100644
--- a/src/Composer/Downloader/GitDownloader.php
+++ b/src/Composer/Downloader/GitDownloader.php
@@ -12,8 +12,6 @@
 
 namespace Composer\Downloader;
 
-use Composer\Package\PackageInterface;
-
 /**
  * @author Jordi Boggiano <j.boggiano@seld.be>
  */
@@ -22,7 +20,7 @@ class GitDownloader implements DownloaderInterface
     /**
      * {@inheritDoc}
      */
-    public function download(PackageInterface $package, $path, $url, $checksum = null, $useSource = false)
+    public function download($path, $url, $checksum = null, $useSource = false)
     {
         system('git clone '.escapeshellarg($url).' -b master '.escapeshellarg($path));
 
@@ -33,7 +31,7 @@ class GitDownloader implements DownloaderInterface
     /**
      * {@inheritDoc}
      */
-    public function update(PackageInterface $initial, PackageInterface $target, $path, $useSource = false)
+    public function update($path, $url, $checksum = null, $useSource = false)
     {
         $cwd = getcwd();
         chdir($path);
@@ -44,7 +42,7 @@ class GitDownloader implements DownloaderInterface
     /**
      * {@inheritDoc}
      */
-    public function remove(PackageInterface $package, $path, $useSource = false)
+    public function remove($path, $useSource = false)
     {
         echo 'rm -rf '.$path; // TODO
     }
diff --git a/tests/Composer/Test/Downloader/DownloadManagerTest.php b/tests/Composer/Test/Downloader/DownloadManagerTest.php
index 16131a180..1d0f6d877 100644
--- a/tests/Composer/Test/Downloader/DownloadManagerTest.php
+++ b/tests/Composer/Test/Downloader/DownloadManagerTest.php
@@ -58,7 +58,7 @@ class DownloadManagerTest extends \PHPUnit_Framework_TestCase
         $pearDownloader
             ->expects($this->once())
             ->method('download')
-            ->with($package, 'target_dir', 'dist_url', 'sha1', false);
+            ->with('target_dir', 'dist_url', 'sha1', false);
 
         $manager = new DownloadManager();
         $manager->setDownloader('pear', $pearDownloader);
@@ -114,7 +114,7 @@ class DownloadManagerTest extends \PHPUnit_Framework_TestCase
         $pearDownloader
             ->expects($this->once())
             ->method('download')
-            ->with($package, 'target_dir', 'dist_url', 'sha1', false);
+            ->with('target_dir', 'dist_url', 'sha1', false);
 
         $manager = new DownloadManager();
         $manager->setDownloader('pear', $pearDownloader);
@@ -148,7 +148,7 @@ class DownloadManagerTest extends \PHPUnit_Framework_TestCase
         $gitDownloader
             ->expects($this->once())
             ->method('download')
-            ->with($package, 'vendor/pkg', 'source_url', false);
+            ->with('vendor/pkg', 'source_url', null, false);
 
         $manager = new DownloadManager();
         $manager->setDownloader('git', $gitDownloader);
@@ -182,7 +182,7 @@ class DownloadManagerTest extends \PHPUnit_Framework_TestCase
         $gitDownloader
             ->expects($this->once())
             ->method('download')
-            ->with($package, 'vendor/pkg', 'source_url', true);
+            ->with('vendor/pkg', 'source_url', null, true);
 
         $manager = new DownloadManager();
         $manager->setDownloader('git', $gitDownloader);
@@ -221,7 +221,7 @@ class DownloadManagerTest extends \PHPUnit_Framework_TestCase
         $pearDownloader
             ->expects($this->once())
             ->method('download')
-            ->with($package, 'target_dir', 'dist_url', 'sha1', true);
+            ->with('target_dir', 'dist_url', 'sha1', true);
 
         $manager = new DownloadManager();
         $manager->setDownloader('pear', $pearDownloader);
@@ -256,7 +256,7 @@ class DownloadManagerTest extends \PHPUnit_Framework_TestCase
         $gitDownloader
             ->expects($this->once())
             ->method('download')
-            ->with($package, 'vendor/pkg', 'source_url', true);
+            ->with('vendor/pkg', 'source_url', null, true);
 
         $manager = new DownloadManager();
         $manager->setDownloader('git', $gitDownloader);
@@ -301,12 +301,20 @@ class DownloadManagerTest extends \PHPUnit_Framework_TestCase
             ->expects($this->once())
             ->method('getDistType')
             ->will($this->returnValue('pear'));
+        $target
+            ->expects($this->once())
+            ->method('getDistUrl')
+            ->will($this->returnValue('d_url'));
+        $target
+            ->expects($this->once())
+            ->method('getDistSha1Checksum')
+            ->will($this->returnValue('sha'));
 
         $pearDownloader = $this->createDownloaderMock();
         $pearDownloader
             ->expects($this->once())
             ->method('update')
-            ->with($initial, $target, 'vendor/bundles/FOS/UserBundle', false);
+            ->with('vendor/bundles/FOS/UserBundle', 'd_url', 'sha', false);
 
         $manager = new DownloadManager();
         $manager->setDownloader('pear', $pearDownloader);
@@ -336,7 +344,7 @@ class DownloadManagerTest extends \PHPUnit_Framework_TestCase
         $pearDownloader
             ->expects($this->once())
             ->method('remove')
-            ->with($initial, 'vendor/bundles/FOS/UserBundle', false);
+            ->with('vendor/bundles/FOS/UserBundle', false);
 
         $manager = $this->getMockBuilder('Composer\Downloader\DownloadManager')
             ->setMethods(array('download'))
@@ -367,12 +375,16 @@ class DownloadManagerTest extends \PHPUnit_Framework_TestCase
             ->expects($this->once())
             ->method('getSourceType')
             ->will($this->returnValue('svn'));
+        $target
+            ->expects($this->once())
+            ->method('getSourceUrl')
+            ->will($this->returnValue('s_url'));
 
         $svnDownloader = $this->createDownloaderMock();
         $svnDownloader
             ->expects($this->once())
             ->method('update')
-            ->with($initial, $target, 'vendor/pkg', true);
+            ->with('vendor/pkg', 's_url', null, true);
 
         $manager = new DownloadManager();
         $manager->setDownloader('svn', $svnDownloader);
@@ -402,7 +414,7 @@ class DownloadManagerTest extends \PHPUnit_Framework_TestCase
         $svnDownloader
             ->expects($this->once())
             ->method('remove')
-            ->with($initial, 'vendor/pkg', true);
+            ->with('vendor/pkg', true);
 
         $manager = $this->getMockBuilder('Composer\Downloader\DownloadManager')
             ->setMethods(array('download'))
@@ -443,7 +455,7 @@ class DownloadManagerTest extends \PHPUnit_Framework_TestCase
         $pearDownloader
             ->expects($this->once())
             ->method('remove')
-            ->with($package, 'vendor/bundles/FOS/UserBundle');
+            ->with('vendor/bundles/FOS/UserBundle', false);
 
         $manager = new DownloadManager();
         $manager->setDownloader('pear', $pearDownloader);
@@ -467,7 +479,7 @@ class DownloadManagerTest extends \PHPUnit_Framework_TestCase
         $svnDownloader
             ->expects($this->once())
             ->method('remove')
-            ->with($package, 'vendor/pkg');
+            ->with('vendor/pkg', true);
 
         $manager = new DownloadManager();
         $manager->setDownloader('svn', $svnDownloader);