From 98380f3aadfe0abee04f365bc9014e6fdfe0fe1b Mon Sep 17 00:00:00 2001
From: Jordi Boggiano <j.boggiano@seld.be>
Date: Thu, 12 Apr 2012 22:35:16 +0200
Subject: [PATCH] Improve unzip failure message

---
 src/Composer/Downloader/ZipDownloader.php | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/src/Composer/Downloader/ZipDownloader.php b/src/Composer/Downloader/ZipDownloader.php
index fac30eef2..4ad99095a 100644
--- a/src/Composer/Downloader/ZipDownloader.php
+++ b/src/Composer/Downloader/ZipDownloader.php
@@ -42,7 +42,8 @@ class ZipDownloader extends ArchiveDownloader
                     return;
                 }
 
-                $error = 'Failed to execute ' . $command . "\n\n" . $this->process->getErrorOutput();
+                $error = "Could not decompress the archive, enable the PHP zip extension or install unzip.\n".
+                    'Failed to execute ' . $command . "\n\n" . $this->process->getErrorOutput();
             }
 
             throw new \RuntimeException($error);