diff --git a/osc/build.py b/osc/build.py
index aaab151e..ac3b5299 100644
--- a/osc/build.py
+++ b/osc/build.py
@@ -236,6 +236,8 @@ pass: %s
         if val:
             if var.startswith('OSC_'): var = var[4:]
             var = var.lower().replace('_', '-')
+            if config.has_key(var):
+                print 'Overriding config value for %s=\'%s\' with \'%s\'' % (var, config[var], val)
             config[var] = val
 
     return config, auth_dict