I got Numpy and Matplotlib running on Heroku, and I\'m trying to install Scipy as well. However, Scipy requires BLAS[1] to install, which is not presented on the Heroku plat
The slug compiler is not aware of your environment variables, which is why it fails during push, and not once running.
The only real option you have is to look at the user_env_compile addon that's currently in labs beta.
user_env_compile
http://devcenter.heroku.com/articles/labs-user-env-compile