Thank you, Yes, `tlsa.so` works now on a Docker image with Debian 11 (Bullseye) (`FROM debian:bullseye-slim`). So `tlsa.so` is the answer to such libssl.so conflicts with external libraries (like mysql). If not available (like version <= 5.6.0), a workaround is to build under Debian 10 (Buster) (and not latest Debian, Ubuntu - for now). I think this issue can be closed.