diff --git a/src/Composer/Downloader/DownloadManager.php b/src/Composer/Downloader/DownloadManager.php
index 96c18c4a5..8f40fdff0 100644
--- a/src/Composer/Downloader/DownloadManager.php
+++ b/src/Composer/Downloader/DownloadManager.php
@@ -94,12 +94,14 @@ class DownloadManager
         if (!($preferSource && $sourceType) && $distType) {
             $downloader = $this->getDownloader($distType);
             $downloader->download(
-                $package, $targetDir, $package->getDistUrl(), $package->getDistSha1Checksum()
+                $package, $targetDir,
+                $package->getDistUrl(), $package->getDistSha1Checksum(),
+                $preferSource
             );
             $package->setInstallationSource('dist');
         } elseif ($sourceType) {
             $downloader = $this->getDownloader($sourceType);
-            $downloader->download($package, $targetDir, $package->getSourceUrl());
+            $downloader->download($package, $targetDir, $package->getSourceUrl(), $preferSource);
             $package->setInstallationSource('source');
         } else {
             throw new \InvalidArgumentException('Package should have dist or source specified');
@@ -135,9 +137,9 @@ class DownloadManager
         $downloader = $this->getDownloader($initialType);
 
         if ($initialType === $targetType) {
-            $downloader->update($initial, $target, $targetDir);
+            $downloader->update($initial, $target, $targetDir, $useSource);
         } else {
-            $downloader->remove($initial, $targetDir);
+            $downloader->remove($initial, $targetDir, $useSource);
             $this->download($target, $targetDir, $useSource);
         }
     }
@@ -164,6 +166,6 @@ class DownloadManager
             $downloader = $this->getDownloader($package->getSourceType());
         }
 
-        $downloader->remove($package, $targetDir);
+        $downloader->remove($package, $targetDir, $useSource);
     }
 }
diff --git a/src/Composer/Downloader/DownloaderInterface.php b/src/Composer/Downloader/DownloaderInterface.php
index 7a114ea2b..863d6bd30 100644
--- a/src/Composer/Downloader/DownloaderInterface.php
+++ b/src/Composer/Downloader/DownloaderInterface.php
@@ -28,8 +28,9 @@ interface DownloaderInterface
      * @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);
+    function download(PackageInterface $package, $path, $url, $checksum = null, $useSource = false);
 
     /**
      * Updates specific package in specific folder from initial to target version.
@@ -37,14 +38,16 @@ interface DownloaderInterface
      * @param   PackageInterface    $initial    initial package
      * @param   PackageInterface    $target     updated package
      * @param   string              $path       download path
+     * @param   Boolean             $useSource  download as source
      */
-    function update(PackageInterface $initial, PackageInterface $target, $path);
+    function update(PackageInterface $initial, PackageInterface $target, $path, $useSource = false);
 
     /**
      * Removes specific package from specific folder.
      *
      * @param   PackageInterface    $package    package instance
      * @param   string              $path       download path
+     * @param   Boolean             $useSource  download as source
      */
-    function remove(PackageInterface $package, $path);
+    function remove(PackageInterface $package, $path, $useSource = false);
 }
diff --git a/tests/Composer/Test/Downloader/DownloadManagerTest.php b/tests/Composer/Test/Downloader/DownloadManagerTest.php
index bf39a377a..cc48bf4d1 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($package, 'target_dir', 'dist_url', 'sha1');
+            ->with($package, '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($package, 'target_dir', 'dist_url', 'sha1');
+            ->with($package, '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($package, 'vendor/pkg', 'source_url');
+            ->with($package, 'vendor/pkg', 'source_url', 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($package, 'vendor/pkg', 'source_url');
+            ->with($package, 'vendor/pkg', 'source_url', 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($package, 'target_dir', 'dist_url', 'sha1');
+            ->with($package, '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($package, 'vendor/pkg', 'source_url');
+            ->with($package, 'vendor/pkg', 'source_url', true);
 
         $manager = new DownloadManager();
         $manager->setDownloader('git', $gitDownloader);
@@ -306,7 +306,7 @@ class DownloadManagerTest extends \PHPUnit_Framework_TestCase
         $pearDownloader
             ->expects($this->once())
             ->method('update')
-            ->with($initial, $target, 'vendor/bundles/FOS/UserBundle');
+            ->with($initial, $target, 'vendor/bundles/FOS/UserBundle', false);
 
         $manager = new DownloadManager();
         $manager->setDownloader('pear', $pearDownloader);
@@ -336,7 +336,7 @@ class DownloadManagerTest extends \PHPUnit_Framework_TestCase
         $pearDownloader
             ->expects($this->once())
             ->method('remove')
-            ->with($initial, 'vendor/bundles/FOS/UserBundle');
+            ->with($initial, 'vendor/bundles/FOS/UserBundle', false);
 
         $manager = $this->getMockBuilder('Composer\Downloader\DownloadManager')
             ->setMethods(array('download'))
@@ -372,7 +372,7 @@ class DownloadManagerTest extends \PHPUnit_Framework_TestCase
         $svnDownloader
             ->expects($this->once())
             ->method('update')
-            ->with($initial, $target, 'vendor/pkg');
+            ->with($initial, $target, 'vendor/pkg', true);
 
         $manager = new DownloadManager();
         $manager->setDownloader('svn', $svnDownloader);
@@ -402,7 +402,7 @@ class DownloadManagerTest extends \PHPUnit_Framework_TestCase
         $svnDownloader
             ->expects($this->once())
             ->method('remove')
-            ->with($initial, 'vendor/pkg');
+            ->with($initial, 'vendor/pkg', true);
 
         $manager = $this->getMockBuilder('Composer\Downloader\DownloadManager')
             ->setMethods(array('download'))