AWS Elastic Beanstalk Django - What happens first when deploying to EB, pip install -r requirements.txt or commands in configuration file

Question

When deploying to the Elastic Beanstalk, in what order are all the dependencies installed? For one part, I have all my project dependencies in requirements.txt. This includes PIL . But for PIL I need to install libjpeg and other libraries as such (this is in .ebextensions/myapp.config

packages:
  yum:
    libjpeg-devel: []
    freetype-devel: []
    zlib-devel: []

... rest of config file

Only problem is, if pip is run first, I would have to reinstall Pillow which I do not know how to do

Answer 1

Documentation mentions that the Packages section is processed first.

The order in which these are processed are as follows:

1. Packages

2. Files

3. Commands

4. Services

5. Container Commands