当我执行命令：mvn package docker：build时,它抛出上述错误：

    Downloaded: http://3.2.4.2:8888/repository/maven-public/org/apache/maven/plugins/maven-metadata.xml (14 KB at 5.7 KB/sec)
    Downloaded: http://3.2.4.2:8888/repository/maven-public/org/codehaus/mojo/maven-metadata.xml (21 KB at 7.3 KB/sec)
    [INFO] ------------------------------------------------------------------------
    [INFO] Reactor Summary:
    [INFO] 
    [INFO] eureka-server ...................................... SUCCESS [ 26.279 s]
    [INFO] service-1 ......................................... SUCCESS [ 14.649 s]
    [INFO] demo1 ........................................... FAILURE [  2.850 s]
    [INFO] ------------------------------------------------------------------------
    [INFO] BUILD FAILURE
    [INFO] ------------------------------------------------------------------------
    [INFO] Total time: 45.535 s
    [INFO] Finished at: 2017-11-15T14:28:05+08:00
    [INFO] Final Memory: 47M/532M
    [INFO] ------------------------------------------------------------------------
    [ERROR] No plugin found for prefix 'docker' in the current project 
and in the plugin groups [org.sonatype.plugins,org.apache.maven.plugins,org.codehaus.mojo] available from the repositories [local (/Users/../Repository),nexus (http://3.2.4.2:8888/repository/maven-public/)]

怎么解决？