"Ant debug" output always shows no changes. How can I force apkbuilder to build APK?

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http://stackoverflow.com – When I type "ant debug" on Jenkins, I always get message like : [aapt] No changed resources. R.java and Manifest.java untouched. [dex] No new compiled code. No need to convert bytecode to dalvik format. [aapt] No changed resources or assets. [apkbuilder] No changes. No need to create apk. The same command from my local computer against the same code from Eclipse does not output the messages above. And it always finds modified input and creates an apk with debug key correctly from command-line. My goal is to create an APK with debug key on Jenkins also. Any idea why "ant debug" is sho (HowTos)