diff --git a/build/build.py b/build/build.py
index d91878146f..c41f3987f5 100755
--- a/build/build.py
+++ b/build/build.py
@@ -1,4 +1,4 @@
-#!/usr/bin/env python
+#!/usr/bin/env python2.6
 
 import sys
 sys.path.append("../tools")
diff --git a/lib/OpenLayers.js b/lib/OpenLayers.js
index b234d9d977..3f13aae7ec 100644
--- a/lib/OpenLayers.js
+++ b/lib/OpenLayers.js
@@ -381,4 +381,4 @@
 /**
  * Constant: VERSION_NUMBER
  */
-OpenLayers.VERSION_NUMBER="Release 2.11-rc3";
+OpenLayers.VERSION_NUMBER="Release 2.11-rc4";
diff --git a/lib/OpenLayers/SingleFile.js b/lib/OpenLayers/SingleFile.js
index 6eb5420a01..cdc62838af 100644
--- a/lib/OpenLayers/SingleFile.js
+++ b/lib/OpenLayers/SingleFile.js
@@ -7,7 +7,7 @@ var OpenLayers = {
     /**
      * Constant: VERSION_NUMBER
      */
-    VERSION_NUMBER: "Release 2.11-rc3",
+    VERSION_NUMBER: "Release 2.11-rc4",
 
     /**
      * Constant: singleFile