>>> import cv2
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
ImportError: /srv/current/stack/lib/libz.so.1: version `ZLIB_1.2.9' not found (required by /nix/store/kyzn5yrqxvbybi8fmk438pm64lqxdylj-libpng-apng-1.6.28/lib/libpng16
.so.16)