jqPlot show percent and value on pie chart

I'm using jqPlot with jqplot.PieRenderer to try and display a pie chart. On the label I'd like to show value (percent). The documentation says you can pass dataLabel an array of label types (source), however, putting %d%% (for percent) and %d (for value) in the dataLabelFormatString option end up showing nothing.

Any ideas here?

{ 
    seriesDefaults: {
        renderer: jQuery.jqplot.PieRenderer, 
        rendererOptions: {
            showDataLabels: true,
            dataLabels: ['value', 'percent'],
            dataLabelFormatString: "%d %d%%",
            sliceMargin: 4,
            fill: false
        }
    }, 
    legend: { show:true, location: 'e' }
}