Hi again, Shipping all packages in the 'unstable' archive on the install CD is handy : this spares debootstrap the bother to merge the 'unstable' and 'unreleased' archives (with some pitfalls [1]).
Option --extra-suites=unreleased is not very useful in this case. Perhaps it may be deactivated in bootstrap-base when installing from a CD. I understand that you created an empty Packages file in the 'unreleased' distribution on the CD. This should work as well, and comes with the extra benefit of making the contents of install CD suitable to set up a local mirror (without any further change except passing option debian-installer/allow_unauthenticated to debootstrap). I hope it will help ! Regards, JH Chatenet [1]: https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=690210#89