diff --git a/configure.py b/configure.py
index e1f5d93..320d7df 100755
--- a/configure.py
+++ b/configure.py
@@ -29,13 +29,17 @@ def cml2_update_config_h(config_h_path, config):
 
 def cml2_configure(cml2_config_file):
     os.system(CML2TOOLSDIR + '/cmlcompile.py -o ' + CML2RULES + ' ' + cml2_config_file)
-    if not os.path.exists(CML2_CONFIG_FILE):
+    if not os.path.exists(CML2_OLDCONFIG_FILE):
         os.system(CML2TOOLSDIR + '/cmlconfigure.py -c -o ' + \
                   CML2_CONFIG_FILE + ' ' + CML2RULES)
     else:
         os.system(CML2TOOLSDIR + '/cmlconfigure.py -c -o ' + CML2_CONFIG_FILE + \
-                  ' -i ' + CML2_CONFIG_FILE +  ' ' + CML2RULES)
+                  ' -i ' + CML2_OLDCONFIG_FILE +  ' ' + CML2RULES)
     os.system(TOOLSDIR + '/cml2header.py -o ' + CML2_CONFIG_H + ' -i ' + CML2_CONFIG_FILE)
+
+    # Do the actual copying here
+    shutil.copy(CML2_CONFIG_FILE, CML2_OLDCONFIG_FILE)
+
     if not os.path.exists("build/l4"):
         os.mkdir("build/l4")
     shutil.copy(CML2_CONFIG_H, CONFIG_H)