--- a/setup.py	Sat Nov 12 02:07:55 2011 +0100
+++ b/setup.py	Tue Nov 01 20:13:53 2011 +0100
@@ -192,7 +192,7 @@
     sub_commands = [('build_mo', None),
                    ] + build.sub_commands
 
-class hgbuildmo(build):
+class hgbuildmo(Command):
 
     description = "build translations (.mo files)"
 
@@ -222,6 +222,12 @@
             self.mkpath(join('mercurial', modir))
             self.make_file([pofile], mobuildfile, spawn, (cmd,))
 
+    def initialize_options(self):
+        pass
+
+    def finalize_options(self):
+        pass
+
 
 class hgdist(Distribution):
     pure = 0