</profile>
        <profile>
            <id>java9</id>
            <activation>
                <jdk>[1.9,)</jdk>
            </activation>
            <properties>
                <!-- JDK 9 minimal source and target versions are 1.6 -->
                <jdkVersion>1.6</jdkVersion>
            </properties>
            <build>
                <plugins>
                    <plugin>