--- PEAR/Builder.php_orig	Mon Dec 12 15:55:01 2011
+++ PEAR/Builder.php	Mon Dec 12 15:54:11 2011
@@ -394,7 +394,7 @@
         $built_files = array();
         $prefix = exec($this->config->get('php_prefix')
                         . "php-config" .
-                       $this->config->get('php_suffix') . " --prefix");
+                       $this->config->get('php_suffix') . " --pear-prefix");
         $this->_harvestInstDir($prefix, $inst_dir . DIRECTORY_SEPARATOR . $prefix, $built_files);
         chdir($old_cwd);
         return $built_files;