diff --git a/py/hexagram/cluster.pyx b/py/hexagram/cluster.py
similarity index 100%
rename from py/hexagram/cluster.pyx
rename to py/hexagram/cluster.py
diff --git a/setup.py b/setup.py
index 47d3e14..864b268 100644
--- a/setup.py
+++ b/setup.py
@@ -11,5 +11,5 @@ setup(
     packages     = [
         'hexagram'
     ],
-    ext_modules  = cythonize("py/hexagram/*.pyx"),
+    #ext_modules  = cythonize("py/hexagram/*.pyx"),
 )