Hi Dan, is there any recent change on server side package ?

As shown in https://wmatrix.googleplex.com/matrix/unfiltered?suites=chameleon_audio_perbuild&days_back=20&hide_missing=True

some of 8607.0 and all of 8608.0 audio tests failed from "sox command not installed"

Log:

07/19 16:45:07.815 WARNI|               lxc:0363| This function is obsoleted, please use install_packages instead.
07/19 16:45:07.847 INFO |        audio_test:0080| Can not install sox outside of container.
07/19 16:45:07.847 DEBUG|        base_utils:0185| Running 'sox --help'
07/19 16:45:07.874 WARNI|              test:0606| Autotest caught exception when running test:
Traceback (most recent call last):
  File "/usr/local/autotest/client/common_lib/test.py", line 587, in _exec
    *args, **dargs)
  File "/usr/local/autotest/client/common_lib/test.py", line 804, in _call_test_function
    return func(*args, **dargs)
  File "/usr/local/autotest/client/common_lib/test.py", line 719, in _cherry_pick_call
    return func(*p_args, **p_dargs)
  File "/usr/local/autotest/server/cros/audio/audio_test.py", line 31, in warmup
    audio_test_requirement()
  File "/usr/local/autotest/server/cros/audio/audio_test.py", line 72, in audio_test_requirement
    check_sox_installed()
  File "/usr/local/autotest/server/cros/audio/audio_test.py", line 96, in check_sox_installed
    raise error.TestError(error_message)
TestError: sox command is not installed.
07/19 16:45:07.876 DEBUG|   logging_manager:0627| Logging subprocess finished
07/19 16:45:07.888 DEBUG|   logging_manager:0627| Logging subprocess finished

It seems that lxc.install_package failed.

def install_sox():                                                               
    """Install sox command on autotest drone."""                                 
    try:                                                                         
        lxc.install_package('sox')                                               
    except error.ContainerError:                                                 
        logging.info('Can not install sox outside of container.')

Could you please take a look what is wrong ?
Thanks a lot!