Oops, said include but do require (thanks Jon and Rasmus)

pear/scripts/pear.in

@@ -65,7 +65,7 @@ PEAR::setErrorHandling(PEAR_ERROR_PRINT);
 $command = $options[1][1];
 switch ($command) {
     case 'install':
-        require_once 'PEAR/Installer.php';
+        include_once 'PEAR/Installer.php';
         $package = $options[1][2];
         $installer =& new PEAR_Installer($script_dir, $ext_dir, $doc_dir);
         $installer->debug = $verbose;
@@ -76,7 +76,7 @@ switch ($command) {
         }
         break;
     case 'package':
-        require_once 'PEAR/Packager.php';
+        include_once 'PEAR/Packager.php';
         $pkginfofile = $options[1][2];
         $packager =& new PEAR_Packager($script_dir, $ext_dir, $doc_dir);
         $packager->debug = $verbose;