[Python] How to keep all my django applications in specific folder

I have a Django project, let's say "project1". Typical folder structure for applications is:

/project1/
/app1/
/app2/
...
__init__.py
manage.py
settings.py
urls.py


What should I do if I want to hold all of my applications in some separate folder, 'apps' for example? So that structure should look like the following:

/project/
apps/
app1/
app2/
...
__init__.py
manage.py
settings.py
urls.py

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