--- a/wscript	Sun Feb 17 14:02:45 2008 +0000
+++ b/wscript	Tue Feb 19 21:43:28 2008 +0000
@@ -348,7 +348,7 @@
     """
     env = Params.g_build.env_of_name('default')
 
-    if command_template is None:
+    if command_template in (None, '%s'):
         argv = shlex.split(program_string)
         program_name = argv[0]