The collectstatic command does not start when deployed to Heroku, but the setup is fine

Question

Things I checked:

• my collectstatic(yes, I call it so as to reduce the configuration with the source directories static) in my repo (via file .gitkeep) (as indicated in the heroku documentation )
• heroku run python manage.py collectstatic --dry-run --noinputworks (offered here )
• collectstatic is not forcibly disabled:heroku config:add DISABLE_COLLECTSTATIC=0
• I push the new commit (so the hero actually deploys)

However, it collectstaticdoes not start. What else can I check?

EDIT

In addition, I correctly identify STATIC_ROOTin settings.py. Relevant section below:

STATIC_URL = '/static/'

STATIC_ROOT = os.path.join(BASE_DIR, 'collectstatic/')

STATICFILES_DIRS = (
    os.path.join(BASE_DIR, 'static'),
)

EDIT2

My installed applications are just django 1.9:

INSTALLED_APPS = [
    'django.contrib.admin',
    'django.contrib.auth',
    'django.contrib.contenttypes',
    'django.contrib.sessions',
    'django.contrib.messages',
    'django.contrib.staticfiles',
]

EDIT3

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Answer 1

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heroku config:unset DISABLE_COLLECTSTATIC

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