Why does Netbeans delete my CVS folder when I do a clean?

Everytime I do a clean and rebuild of my visual web project, Netbeans will delete the CVS folder.  CVS uses this folder to track changes so when Netbeans deletes this folder then the CVS repository can't track the changes in the build directory.  

I do not wish for this behavior.   Is there some way to tell Netbeans to not delete the CVS folder when doing a clean?  I tried a couple tricks with the build.xml script and got it to not delete the CVS folder itself but it will still delete the files in CVS folder. ( I did this using <delete dir="${build.dir}" defaultexcludes="no"/>)