Maven - How to override version?

Question

my pom.xml looks like this:

<project>
...
<version>1.0.0-A</version>
...
</project>

I have to get rid of the '-A' suffix. So I found this plugin which removes it and saves it into a new variable.

    <plugin>
        <groupId>org.codehaus.groovy.maven</groupId>
        <artifactId>gmaven-plugin</artifactId>
        <executions>
          <execution>
            <phase>generate-sources</phase>
            <goals>
              <goal>execute</goal>
            </goals>
            <configuration>
              <source>
                System.setProperty("versionWithOutPrefix", "${project.version}".replace('-SNAPSHOT', ''))
              </source>
            </configuration>
          </execution>
        </executions>
    </plugin>

But I need to get the value of <version> changed. Is there a way to do this?