diff --git a/wx.cabal b/wx.cabal
--- a/wx.cabal
+++ b/wx.cabal
@@ -1,45 +1,38 @@
 Name:           wx
-Version:        0.12.1.2
+Version:        0.12.1.3
 License:        LGPL
 License-file:   license.txt
 Homepage:       http://haskell.org/haskellwiki/WxHaskell
 Author:         Daan Leijen
 Build-Type:     Simple
 Category:       GUI, User interfaces
-Cabal-Version:  >= 1.2
+Cabal-Version:  >= 1.8
 Description:    wxHaskell is a portable and native GUI library for Haskell.  It is built on top of wxWidgets - a comprehensive C++ library that is portable across all major GUI platforms; including GTK, Windows, X11, and MacOS X.  This version works with wxWidgets 2.8 only.
 Maintainer:     wxhaskell-devel@lists.sourceforge.net
 Synopsis:       wxHaskell
 Data-Files:     wx.cabal
 
-Flag splitBase
-    Description: Choose the new smaller, split-up base package.
-
 Library
-    if flag(splitBase)
-        build-depends: base >= 3 && < 5, 
-                       wxcore >= 0.12.1.2,
-                       stm
-    else
-        build-depends: base <  3, 
-                       wxcore >= 0.12.1.2, 
-                       stm
+  build-depends:
+    base >= 4 && < 5,
+    wxcore >= 0.12.1.3,
+    stm
 
- Exposed-Modules:
-  Graphics.UI.WX.Draw
-  Graphics.UI.WX.Media
-  Graphics.UI.WX.TopLevelWindow
-  Graphics.UI.WX.Attributes
-  Graphics.UI.WX.Window
-  Graphics.UI.WX.Variable
-  Graphics.UI.WX.Events
-  Graphics.UI.WX.Frame
-  Graphics.UI.WX.Layout
-  Graphics.UI.WX.Controls
-  Graphics.UI.WX.Types
-  Graphics.UI.WX.Dialogs
-  Graphics.UI.WX.Classes
-  Graphics.UI.WX.Timer
-  Graphics.UI.WX.Menu
-  Graphics.UI.WX
- Hs-Source-Dirs: src
+  Exposed-Modules:
+    Graphics.UI.WX.Draw
+    Graphics.UI.WX.Media
+    Graphics.UI.WX.TopLevelWindow
+    Graphics.UI.WX.Attributes
+    Graphics.UI.WX.Window
+    Graphics.UI.WX.Variable
+    Graphics.UI.WX.Events
+    Graphics.UI.WX.Frame
+    Graphics.UI.WX.Layout
+    Graphics.UI.WX.Controls
+    Graphics.UI.WX.Types
+    Graphics.UI.WX.Dialogs
+    Graphics.UI.WX.Classes
+    Graphics.UI.WX.Timer
+    Graphics.UI.WX.Menu
+    Graphics.UI.WX
+  Hs-Source-Dirs: src