How to add vm option to jetty?

How it is available to specify vm option like -javaagent to start jetty or it is available only thru MAVEN_OPTS variable? I need it to enable load-time-weaving of aspects. This plugin seems like doesn't work.

<plugin>
            <groupId>org.codehaus.mojo</groupId>
            <artifactId>exec-maven-plugin</artifactId>
            <version>1.1</version>
            <executions>
                <execution>
                    <goals>
                        <goal>exec</goal>
                    </goals>
                </execution>
            </executions>
     开发者_如何学Go       <configuration>
                <executable>maven</executable>
                <arguments>
                    <argument>-javaagent:path\to\org\aspectj\aspectjweaver\1.6.10\aspectjweaver-1.6.10.jar</argument>
                </arguments>
            </configuration>
        </plugin>

May be it can be done by jetty-plugin, but its tag systemProperties said that

will NOT override System properties that have been set on the command line or by the JVM

What does it mean?

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you can try add something like this -javaagent:%PATH_TO_AGENT%\spring-agent-2.5.6.jar to the JAVA_OPTS