Ant provides an exec task in order to allow you to fall back on the command line:

<property name="perlmod.dir" location="/tmp/module"/>
<target name="example-mod_build">
    <exec dir="${perlmod.dir}" executable="perl" failonerror="true">
        <arg line="Makefile.PL"/>
    </exec>
    <exec dir="${perlmod.dir}" executable="make" failonerror="true"/>
    <exec dir="${perlmod.dir}" executable="make" failonerror="true">
        <arg line="test"/>
    </exec>
    <exec dir="${perlmod.dir}" executable="make" failonerror="true">
        <arg line="install"/>
    </exec>
</target>
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(See: Exec)

I should point out that this isn't something I've ever needed to do, but if I had to, this is how I'd go about it.

Hope this helps.