distribution.xml

<?xml version="1.0" encoding="utf-8"?>
    <installer-gui-script minSpecVersion="1">
        <pkg-ref id="igormomc.Scrippi">
        <options customize="never" allow-external-scripts="no"/>
        <choices-outline>
            <line choice="default">
                <line choice="igormomc.Scrippi">
            </line>
        </choices-outline>
        <choice id="default"/>
        <choice id="igormomc.Scrippi" visible="false">
            <pkg-ref id="igormomc.Scrippi"/>
        </choice>
        <pkg-ref id="igormomc.Scrippi" version="1.0" onConclusion="none">y.pkg</pkg-ref>
    </installer-gui-script>