was originally using these buildpacks: https://github.com/GramercyStudios/heroku-geo-buildpack.git#1.1 https://github.com/heroku/heroku-buildpack-python.git#v40
got this error when i pushed: Collectstatic configuration error. To debug, run .....
when i ran: heroku run .... collectstatic everything was fine!!!
so i had to patch the python buildpack: https://github.com/mattharley/heroku-buildpack-python/commit/807ac1344b01daa8ccc5da0774adeb55fae3b6f5
then i got when i pushed: -----> Preparing static assets Traceback (most recent call last): .... django.core.exceptions.ImproperlyConfigured: Could not import user-defined GEOMETRY_BACKEND "geos".
so i found a newer fork of heroku-geo-buildpack which had two newer commit to fix everything: https://github.com/Tekco/heroku-geo-buildpack/commits/master
To this stack overflow post Heroku/Django: Could not import user-defined GEOMETRY_BACKEND “geos”