</plugin>
      <plugin>
        <artifactId>maven-jar-plugin</artifactId>
        <configuration>
          <excludes>
            <!-- 2. Don't include the source in the jar (since that would let users depend on it from GWT client code, which is compiled from source). -->
            <exclude>**/ForceGuavaCompilation*</exclude>
            <exclude>**/DummyJavadocClass*</exclude>
          </excludes>
        </configuration>

              <artifactId>plexus-io</artifactId>
              <!-- We need at least 3.5.1 to avoid https://github.com/codehaus-plexus/plexus-io/issues/109. Once we upgrade maven-jar-plugin itself to a version new enough to depend on 3.5.1 or higher, we can remove this override. -->
              <version>3.5.1</version>
            </dependency>
          </dependencies>
        </plugin>
        <plugin>

              <artifactId>plexus-io</artifactId>
              <!-- We need at least 3.5.1 to avoid https://github.com/codehaus-plexus/plexus-io/issues/109. Once we upgrade maven-jar-plugin itself to a version new enough to depend on 3.5.1 or higher, we can remove this override. -->
              <version>3.5.1</version>
            </dependency>
          </dependencies>
        </plugin>
        <plugin>

If you used to rely on this behavior, now you should create the resources for background tasks inside the background task itself, and use internally only data that doesn't depend on the resources of dependencies with `yield`.