Hi Dan, sorry for the terribly late reply.
I've just stumbled on this issue and managed to fix it by adding the following syntax:
<build>
<pluginManagement>
<plugins>
<plugin>
<groupId>org.eclipse.m2e</groupId>
<artifactId>lifecycle-mapping</artifactId>
<version>1.0.0</version>
<configuration>
<lifecycleMappingMetadata>
<pluginExecutions>
<pluginExecution>
<pluginExecutionFilter>
<!--<groupId>some-group-id</groupId>
<artifactId>some-artifact-id</artifactId>
<versionRange>[1.0.0,)</versionRange>-->
<groupId>org.alfresco.maven.plugin</groupId>
<artifactId>alfresco-maven-plugin</artifactId>
<versionRange>[0.0.0,)</versionRange>
<goals>
<goal>set-version</goal>
</goals>
</pluginExecutionFilter>
<action>
<execute >
<runOnIncremental>false</runOnIncremental>
</execute >
</action>
</pluginExecution>
</pluginExecutions>
</lifecycleMappingMetadata>
</configuration>
</plugin>
</plugins>
</pluginManagement>
</build>
Thanks!
Maurizio