Target `compile-jars' does not exist in this project.

[am2000]

运行build.xml出现错误：
Target `compile-jars' does not exist in this project.


<target name="sample-setup" depends="depends" description="--> description">

<ant antfile="build.xml" dir="${pentaho-project}" target="compile-jars"></ant>
<copy todir="lib">
<fileset dir="${pentaho-project}/build/pentaho-third-party">
<include name="pentaho-*.jar" />
</fileset>
</copy>
............

[amozon]

不理解写<ant antfile="build.xml" dir="${pentaho-project}" target="compile-jars"></ant>的用意
定义为<target name="compile-jars" depends="">
。。。
不好么？