pkgbuild is based on rpmbuild and the JDS spec files are very similar to Linux spec files, with a few extra features for Solaris support. As such, Requires and BuildRequires is documented in any rpm documentation. Maybe look at http://www.rpm.org/max-rpm/
How are you building pkgtool? Are you using 'cbe-install' script? What errors are you getting? This message posted from opensolaris.org
