alpine linux raspberry pi 3 configure camera

Hi all,
I'm trying to setup the camera on my raspberry pi but it doesn't work.
my python code crash:
mmal: mmal_component_create_core: could not find component 'vc.camera_info'
Traceback (most recent call last):
File "capture.py", line 3, in
with picamera.PiCamera() as camera:
File "/usr/lib/python3.5/site-packages/picamera/camera.py", line 367, in __init__
with mo.MMALCameraInfo() as camera_info:
File "/usr/lib/python3.5/site-packages/picamera/mmalobj.py", line 1412, in __init__
super(MMALCameraInfo, self).__init__()
File "/usr/lib/python3.5/site-packages/picamera/mmalobj.py", line 446, in __init__
prefix="Failed to create MMAL component %s" % self.component_type)
File "/usr/lib/python3.5/site-packages/picamera/exc.py", line 157, in mmal_check
raise PiCameraMMALError(status, prefix)
picamera.exc.PiCameraMMALError: Failed to create MMAL component b'vc.camera_info': Function not implemented

could you please help me?

thanks