--- output.orig.spec	2010-07-07 09:40:12.216880219 +0800
+++ output.spec	2010-07-07 09:40:22.080459763 +0800
@@ -11,6 +11,7 @@ Version:    1.0
 Release:    1
 Group:      System/Base
 License:    BSD
+Prefix:  /opt
 URL:        http://www.testpkg.org/
 Source0:    http://www.testpkg.org/testpkg-%{version}.tar.gz
 Source100:  testpkg.yaml
