diff -ur matplotlib-1.2.0.orig/setup.py matplotlib-1.2.0/setup.py
--- setup.py	2012-11-08 10:24:12.000000000 +0800
+++ setup.py	2012-11-25 06:55:27.531042898 +0800
@@ -171,20 +171,19 @@
 # regardless of the lack of dependencies. If auto, silently skip
 # when dependencies are missing.
 if options['build_tkagg']:
-    if check_for_tk() or (options['build_tkagg'] is True):
-        options['build_agg'] = 1
-        build_tkagg(ext_modules, packages)
-        rc['backend'] = 'TkAgg'
+    options['build_agg'] = 1
+    build_tkagg(ext_modules, packages)
+    rc['backend'] = 'TkAgg'
 
-hasgtk = check_for_gtk()
-if options['build_gtk']:
-    if hasgtk or (options['build_gtk'] is True):
-        build_gdk(ext_modules, packages)
-if options['build_gtkagg']:
-    if hasgtk or (options['build_gtkagg'] is True):
-        options['build_agg'] = 1
-        build_gtkagg(ext_modules, packages)
-        rc['backend'] = 'GTKAgg'
+if sys.version_info[0] >= 3:
+    hasgtk = False
+else:
+    hasgtk = True
+if hasgtk and (options['build_gtk'] is True):
+    build_gdk(ext_modules, packages)
+    options['build_agg'] = 1
+    build_gtkagg(ext_modules, packages)
+    rc['backend'] = 'GTKAgg'
 
 if options['build_macosx']:
     if check_for_macosx() or (options['build_macosx'] is True):