Please use the maven shade plugin instead. Just specify the plugin in the POM and configure the artifacts to include/exclude with their relocation pattern as you would for the shade plugin. Then set minimizeJar to true.
...
<build>
<plugins>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-shade-plugin</artifactId>
<version>1.4</version>
<executions>
<execution>
<phase>package</phase>
<goals>
<goal>shade</goal>
</goals>
<configuration>
<minimizeJar>true</minimizeJar>
<artifactSet>
<includes>
<include>org.apache.commons:commons-compress</include>
</includes>
</artifactSet>
<relocations>
<relocation>
<pattern>org.apache.commons</pattern>
<shadedPattern>com.yourdomain.shaded.compress</shadedPattern>
</relocation>
</relocations>
</configuration>
</execution>
</executions>
</plugin>
</plugins>
</build>
...