[tycho-user] How to use customized qualifier string

[Mengxin Zhu <kane.zhu@xxxxxxxxxxxxx>]

The default qualifier string of p2 repository built by Tycho is 
'yyyyMMddHHmm'. How can I customize the qualifier string? I want to add 
prefix prior to the building timestamp.

I'm using below snippet, but it doesn't work.

<plugin>
<groupId>org.eclipse.tycho</groupId>
<artifactId>tycho-packaging-plugin</artifactId>
<version>${tycho-version}</version>
<configuration>
<qualifier>myprefix_${buildQualifier}</qualifier>
</configuration>
</plugin>

Thanks.

--
Mengxin Zhu