java – Ant覆盖自定义清单文件

我正在创建一个带有Ant的jar,它也使用自定义清单文件. build.xml文件正确构建所有内容.但是,当我检查jar中的清单文件时,我的属性不存在.看起来它被替换为Ant构建的默认MANIFEST.MF文件.我的构建文件如下：

<?xml version="1.0" ?>

<property name="src" location="src" />
<property name="build" location="build" />
<property name="dist" location="dist" />

<target name="clean">
    <delete dir="${build}" />
    <delete dir="${dist}" />
</target>

<target name="main" depends="compile,dist,build">
    <echo>
        Building the .jar file.
    </echo>
</target>

<target name="build">
    <mkdir dir="${build}" />
    <mkdir dir="${build}/meta-inf" />
</target>

<target name="compile" depends="build">
    <javac srcdir="${src}" destdir="${build}"/>
</target>

<target name="dist" depends="compile">
    <mkdir dir="${dist}/lib" />
    <manifest file="${build}/meta-inf/MANIFEST.MF">
        <attribute name="Class-Path" value="MyGame.jar" />
        <attribute name="Main-Class" value="game.Game"/>    
    </manifest>

    <jar jarfile="${dist}/lib/MyGame.jar" basedir="${build}" />

</target>

我需要更改什么来指定自定义清单而不是默认的Ant MANIFEST.MF文件？

<target name="dist" depends="compile">

    <mkdir dir="${dist}/lib" />

    <manifest file="${build}/meta-inf/MANIFEST.MF">
        <attribute name="Class-Path" value="MyGame.jar" />
        <attribute name="Main-Class" value="game.Game"/>  
    </manifest>

    <jar manifest="${build}/meta-inf/MANIFEST.MF" jarfile="${dist}/lib/MyGame.jar" basedir="${build}" />

</target>