Staggered install of pip requirements on Heroku
Okay so a workaround: 
Remove the latter package in the requirements.txt file which depends on the earlier one. Deploy to heroku so the earlier one is installed. Then add back the package you removed and deploy again. Huzzah!
I have a Flask app running on Heroku. 
Installing from requirements.txt is failing as later packages depend on the on the earlier ones to be installed first. 
Is there a way to stagger these installs, or to run a bash script to install one at a time when the dyno is spun up?