--- a/setup.py	Wed Aug 17 08:55:01 2011 -0500
+++ b/setup.py	Sat Nov 12 02:07:55 2011 +0100
@@ -44,7 +44,7 @@
     pass
 
 if isironpython:
-    print "warning: IronPython detected (no bz2 support)"
+    sys.stderr.write("warning: IronPython detected (no bz2 support)\n")
 else:
     try:
         import bz2