kotlin-fork/compiler/testData/integration/ant/jvm/withKotlinNoJavaSources/build.xml

<project name="Ant Task Test" default="build">
    <taskdef resource="org/jetbrains/kotlin/ant/antlib.xml" classpath="${kotlin.lib}/kotlin-ant.jar"/>

    <target name="build">
        <mkdir dir="${temp}/classes"/>
        <javac srcdir="${test.data}" destdir="${temp}/classes" includeantruntime="false">
            <withKotlin>
                <compilerarg line="-Xuse-fir-lt=false"/>
            </withKotlin>
        </javac>
        <jar destfile="${temp}/hello.jar">
            <fileset dir="${temp}/classes"/>
        </jar>
    </target>
</project>