old_contents: from mopidy_packages import app
  
  app.run()
  
new_contents: import os
  import sys
  
  sys.path.insert(0, os.path.abspath(
      os.path.join(os.path.dirname(__file__), '..')))
  
  from mopidy_packages import app
  
  app.run()
  
subject: Make __main__ work without path adjustment