maven 的一个小问题请教一下

在网上看 maven 教程时，学习了构建生命周期，然后按教程给 clean 生命周期的 pre-clean、clean、post-clean 三个阶段绑定了 maven-antrun-plugin 插件来输出信息，然而执行 mvn post-clean 只有 clean 阶段才有输出,不明白是哪里出了问题。

附配置文件

<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0
   http://maven.apache.org/xsd/maven-4.0.0.xsd">
    <modelVersion>4.0.0</modelVersion>
    <groupId>com.companyname.projectgroup</groupId>
    <artifactId>project</artifactId>
    <version>1.0</version>
    <build>
        <plugins>
            <plugin>
                <groupId>org.apache.maven.plugins</groupId>
                <artifactId>maven-antrun-plugin</artifactId>
                <version>1.1</version>
                <executions>
                    <execution>
                        <id>pre-clean-echo</id>
                        <phase>pre-clean</phase>
                        <goals>
                            <goal>run</goal>
                        </goals>
                        <configuration>
                            <tasks>
                                <echo>pre-clean phase</echo>
                            </tasks>
                        </configuration>
                    </execution>
                    <execution>
                        <id>clean-echo</id>
                        <phase>clean</phase>
                        <goals>
                            <goal>run</goal>
                        </goals>
                        <configuration>
                            <tasks>
                                <echo>clean phase</echo>
                            </tasks>
                        </configuration>
                    </execution>
                    <execution>
                        <id>post-clean-echo</id>
                        <phase>post-clean</phase>
                        <goals>
                            <goal>run</goal>
                        </goals>
                        <configuration>
                            <tasks>
                                <echo>post-clean phase</echo>
                            </tasks>
                        </configuration>
                    </execution>
                </executions>
            </plugin>
        </plugins>
    </build>
</project>

mvn post-clean 输出如下

D:\other>mvn post-clean
[INFO] Scanning for projects...
[INFO]
[INFO] ----------------< com.companyname.projectgroup:project >----------------
[INFO] Building project 1.0
[INFO] --------------------------------[ jar ]---------------------------------
[INFO]
[INFO] --- maven-clean-plugin:2.5:clean (default-clean) @ project ---
[INFO]
[INFO] --- maven-antrun-plugin:1.1:run (id.clean) @ project ---
[INFO] Executing tasks
     [echo] clean phase
[INFO] Executed tasks
[INFO] ------------------------------------------------------------------------
[INFO] BUILD SUCCESS
[INFO] ------------------------------------------------------------------------
[INFO] Total time: 0.652 s
[INFO] Finished at: 2018-05-09T15:39:00+08:00
[INFO] ------------------------------------------------------------------------