Hello, I fiddled with it until it compiled again - the new version is needed to compile the sra-sdk. The problem was with the crypto functions for which the ncbi wrapper function was not existing for a few callbacks, so I used the original function. But I cannot claim to truly have known what I was doing.
git diff 7e29d064babc8fe48996b15bedde2348ea17670c debian/patches/ and there lines matching "vdb_mbedtls" Thanks. Steffen

