Why Is cryptography built from source?

[stumpylog]

I was looking at some possible improvements to the Dockerfile and curious why cryptography is build from source? It provides wheels for both the build platforms (x86_64 and ARM64), so why does the build not use those?

[stumpylog]

Even with building from source, I can shrink the image significantly:

me@server[~/apprise-api]: docker image ls
REPOSITORY       TAG       IMAGE ID       CREATED         SIZE
apprise          test      1c2c32027066   2 minutes ago   234MB
caronc/apprise   latest    8fc9dd34b1f6   4 weeks ago     2.03GB

[caronc]

Thank you for doing this and sharing your work!