Qml Map PluginParameter does not accept variable values

Map {
    plugin: Plugin {
        id: plugin
        name: "osm"

        PluginParameter {
            name: "test"
            value: plugin.name // does not work: QMap(("test", QVariant(Invalid)))
            //value: 10 // works: QMap(("test", QVariant(int, 10)))
        }
    }
}