From fbf9a27132f028ed2c25f1b76347552c8c598e66 Mon Sep 17 00:00:00 2001
From: Benjamin Eberlei <kontakt@beberlei.de>
Date: Mon, 19 Nov 2012 13:51:24 +0100
Subject: [PATCH] Works on Linux when proc_open misses

---
 src/Composer/Util/Filesystem.php | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

diff --git a/src/Composer/Util/Filesystem.php b/src/Composer/Util/Filesystem.php
index 90736995e..7a8982131 100644
--- a/src/Composer/Util/Filesystem.php
+++ b/src/Composer/Util/Filesystem.php
@@ -152,11 +152,11 @@ class Filesystem
             return;
         }
 
-        if (defined('PHP_WINDOWS_VERSION_BUILD')) {
-            if (!function_exists('proc_open')) {
-                return $this->copyThenRemove($source, $target);
-            }
+        if (!function_exists('proc_open')) {
+            return $this->copyThenRemove($source, $target);
+        }
 
+        if (defined('PHP_WINDOWS_VERSION_BUILD')) {
             // Try to copy & delete - this is a workaround for random "Access denied" errors.
             $command = sprintf('xcopy %s %s /E /I /Q', escapeshellarg($source), escapeshellarg($target));
             if (0 === $this->processExecutor->execute($command)) {