Using antcontrib task via maven-antrun-plugin

I think it is not a very good idea to add ant to compile classpath in order to run maven plugin.

I use Maven 3.0.4 and it worked by specifying namespace for ant-contrib tags, for example:

<configuration>
  <target>
    <echo message="The first five letters of the alphabet are:"/>
    <ac:for list="a,b,c,d,e" param="letter" xmlns:ac="antlib:net.sf.antcontrib">
      <sequential>
        <echo>Letter @{letter}</echo>
      </sequential>
    </ac:for>
  </target>
</configuration>

My maven-antrun-plugin dependencies:

<dependencies>
  <dependency>
    <groupId>ant-contrib</groupId>
    <artifactId>ant-contrib</artifactId>
    <version>1.0b3</version>
    <exclusions>
      <exclusion>
        <groupId>ant</groupId>
        <artifactId>ant</artifactId>
      </exclusion>
    </exclusions>
  </dependency>
  <dependency>
    <groupId>org.apache.ant</groupId>
    <artifactId>ant-nodeps</artifactId>
    <version>1.8.1</version>
  </dependency>
</dependencies>