old_contents: import sys
  
  PROJECT_DIR = '/srv/www/debsources/web/flask'
  sys.path.append(PROJECT_DIR)
  
  from app import app as application
new_contents: import sys
  
  PROJECT_DIR = '/srv/debsources/web/flask/'
  sys.path.append(PROJECT_DIR)
  
  from app import app as application
subject: correct path for debsources.wsgi