calling an Ant task from "mvn" command

[Nathaniel Auvil]

i have the following defined in my POM

        <plugin>
                <artifactId>maven-antrun-plugin</artifactId>
                <executions>
                    <execution>
                        <phase>generate-sources</phase>
                        <configuration>
                            <tasks>

                                <echo message="yeah yeah yeah" />
                            <!--
                            Place any ant task here. You can add anything
                            you can add between <target> and </target> in a
                            build.xml.
                            -->

                            </tasks>
                        </configuration>
                        <goals>
                            <goal>run</goal>
                        </goals>
                    </execution>
                </executions>
            </plugin>


How can i invoke that ant script in and of itself?  I have tried: "mvn
ant:run" but it says there is no goal "run" defined.