Unable to pass -DskipAssembly=true through the command line to skip the assembly plugin.

Configured my assembly plugin as follows:

<plugin>
<artifactId>maven-assembly-plugin</artifactId>
<configuration>
<descriptors>
<descriptor> target/classes/maven/assembly/assembly.xml</descriptor>
</descriptors>
</configuration>
<executions>
<execution>
<id>make-assembly</id>
<phase>package</phase>
<goals>
<goal>attached</goal>
</goals>
</execution>
</executions>
</plugin>

I want to skip running this assembly plugin, so I attempted to use the -DskipAssembly=true command line parameter to no avail, the plugin still runs.

I am however able to change other parameters through the command line, such as -DappendAssemblyId=false, and the change is picked up.