core-integration-testing/core-integration-testing-plugins/maven-it-plugin-fork/src/main/resources/META-INF/maven/lifecycle.xml

<lifecycles>
  <lifecycle>
    <id>foo</id>
    <phases>
      <phase>
        <id>generate-sources</id>
        <executions>
          <execution>
            <configuration>
              <outputDirectory>${project.build.directory}/forked</outputDirectory>
            </configuration>
            <goals>
              <goal>touch</goal>
            </goals>
          </execution>
          <execution>
            <configuration>
              <outputDirectory>${project.build.directory}/forked2</outputDirectory>
            </configuration>
            <goals>
              <goal>touch</goal>
            </goals>
          </execution>
        </executions>
      </phase>
    </phases>
  </lifecycle>
</lifecycles>