Hello, tools like singularity (https://github.com/hpcng/github) can be used to create containers of older distributions, like sle12 or centos-7. With tumbleweed this is not possible any more, as the rpm binary from tumbleweed can't create a rpmdb in bdb format and the rpm binaries from sle12 or centos-7 can't open a rpmdb with the ndb format created during the bootstrap process. Also backporting the rpmdb from ndb to bdb seems to be impossible as the dump formats for the databases differ. A solution to this problem could be to to have an additional rpm_bdb binary in tumbleweed, which only is used for bootstrapping older linux distros. Is this sensible? kind regards, Christian -- Christian Goll CGoll@suse.com SUSE Software Solutions Germany GmbH Maxfeldstr. 5 90409 Nürnberg Germany (HRB 36809, AG Nürnberg) Geschäftsführer: Felix Imendörffer -- Christian Goll CGoll@suse.com SUSE Software Solutions Germany GmbH Maxfeldstr. 5 90409 Nürnberg Germany (HRB 36809, AG Nürnberg) Geschäftsführer: Felix Imendörffer