addition project to build for maven-multiproject-plugin's goal

[Dan Tran]

 
Hello, 
 
I have a need to add additional projects into multiproject:install goal.
My attemp to set
 
   maven.multiproject.includes=*/project.xml,
../../otherproject/project.xml
 
does not work. Is it the right approach?
 
Advice is greatly appreciated.
 
-D