How to install scikit-learn on heroku cedar?

Question

I\'v successfully installed numpy and scipy using the method described in this answer. Then I wanted to add scikit-learn so at first I tried adding scikit-learn==0.11<

Answer 1

Based on these pointers, I just finished an installation of scikit-learn on heroku. I was quite happy to see that there is no need to get custom binaries, but that setting some environments did the trick :)

You can find the additional custom step in my fork of the buildpack of wyn: https://github.com/ToonTimbermont/heroku-buildpack-python

The key was to set the proper values for LD_LIBRARY_PATH: export LD_LIBRARY_PATH=$(pwd)/vendor/lib:$(pwd)/vendor/lib/atlas- base:$(pwd)/vendor/lib/atlas-base/atlas

I also added these paths to the heroku config: heroku config:add LD_LIBRARY_PATH=/app/.heroku/vendor/lib/atlas-base/atlas:/app/.heroku/vendor/lib/atlas-base:/app/.heroku/vendor/lib/