I installed libnacl==1.4.3 using Python 2.7 as my runtime. I am using https://github.com/ddollar/heroku-buildpack-multi , and here is what my buildpacks file looks like this :

https://github.com/envato/heroku-buildpack-libsodium
https://github.com/heroku/heroku-buildpack-python

The build throws no errors. But I see errors importing libnacl in my python views.

Here is the error:
Could not locate nacl lib, searched for libsodium.so, libsodium.so.13, libsodium.so.10, libsodium.so.5, libsodium.so.4, and tweetnacl.so

Any pointers on how I can resolve the issue?

Thanks for the help in advance.