packaging XULRunner

Hi all,

I've build XULRunner version 1.8.0.4 from sources 
(ftp://ftp.mozilla.org/pub/mozilla.org/xulrunner/nightly/latest-mozilla1.8.0/xulrunner-1.8.0.4.en-US.mac.dmg 
was built without java libraries I need), but it's not clear for me how to 
create a tarball.

I've tried to run "make -C ./objdir/xulrunner/installer" but it failed...
Makefile:90: *** CHOWN_ROOT must be set to a script.. Stop.
make[1]: *** [libs] Error 2
......


Please tell me what should be done to avoid this problem...

Thanks.
Dmitriy.