postfix-cdb please
Subject says it all. You guys have exim-cdb but no postfix-cdb in your packages. ;-(
postmap cdb:virtual
postmap: fatal: unsupported dictionary type: cdb. Is the postfix-cdb package installed?
make: *** [Makefile:6: virtual.cdb] Error 1
(from redmine: issue id 9327, created on 2018-08-22)