Ubuntu 16.04. The flags didn't work for me. Configuring ldconfig helped:

1. sudo nano /etc/ld.so.conf.d/lib.conf
write path to ssl lib: "/usr/local/ssl"
2. sudo ldconfig
3. pyenv install 3.11 
4. Profit!

May need to install openssl from source:

1. wget http://www.openssl.org/source/openssl-3.0.7.tar.gz (because https://www.openssl.org/news/secadv/20221101.txt )
2. tar -xzf openssl-3.0.7.tar.gz
3. make && sudo make install