<build>
      <plugins>
          <plugin>
              <groupId>org.apache.maven.plugins</groupId>
              <artifactId>maven-source-plugin</artifactId>
              <version>2.4</version>
              <executions>
                  <execution>
                      <phase>package</phase>
                      <goals>
                          <goal>
                          jar-no-fork
                          </goal>
                      </goals>
                  </execution>
              </executions>
          </plugin>
      </plugins>
  </build>
</project>