<build>

    <plugins>

      <plugin>

        <artifactId>maven-antrun-plugin</artifactId>

        <executions>

          <execution>

            <phase>process-resources</phase>

            <configuration>

              <tasks>

                <echo>Replacing @build@</echo>

                <replace file="about.mappings" 

                         token="@build@" value="${unqualifiedVersion}.${buildQualifier}" />

              </tasks>

            </configuration>

            <goals>

              <goal>run</goal>

            </goals>

          </execution>

        </executions>

      </plugin>

    </plugins>

  </build>