maven-dependency-plugin not unpacking properly

[EJ Ciramella]

Is anyone else able to use the unpack-dependencies plugin goal and
specify, say, a single file?
 
                        <configuration>
                            <excludes>**/*</excludes>
                            <includes>common.properties</includes>
 
I've tried everything I can think of (all kinds of patterens and what
not), but this doesn't work at all.