I'm trying to use Pillow in a Pants project, but suddenly my application is failing with

ImportError: libjpeg.so.8: cannot open shared object file

. I've lost the original template, on which the Dockerfile is based, but I thought all dependencies were baked into the PEX-directly? How would I go about ensuring libjpeg is installed and available to the PEX. I've tried to apt-install it in the docker image without avail. Running

find / -name libjpeg.so

returns

/usr/lib/x86_64-linux-gnu/libjpeg.so

All Python dependencies would be. But a Python module written in C/C++ could still have external shared library dependencies like the one you mention here for libjpeg.

Resolved by upgrading Pillow from 9.* 10.*