test_get_unity_top_container failed on mako#89

Running the alternate launcher from the installed location failes on mako.

_StringException: Empty attachments:
  /var/log/syslog

test-log: {{{
14:28:24.166 INFO globals:58 - ************************************************************
14:28:24.172 INFO globals:59 - Starting test
ubuntuuitoolkit.tests.custom_proxy_objects.test_flickable.UnityFlickableTestCase.test_get_unity_top_container
14:28:24.182 WARNING testcase:116 - No tracing available - install the python-autopilot-trace package!
14:28:24.187 WARNING testcase:157 - Process manager backend unavailable, application snapshot support disabled.
14:28:24.449 INFO testcase:258 - Attempting to launch application '/usr/lib/ubuntu-ui-toolkit/launcher' with arguments '-engine -I /home/modules
/tmp/tmp5NFLHk.qml --desktop_file_hint=/home/phablet/.local/share/applications/tmpH8aT0a.desktop' as a normal process
14:28:24.469 INFO _launcher:255 - Launching process: ['/usr/lib/ubuntu-ui-toolkit/launcher', '-testability', '-engine', '-I', '/home/modules',
'/tmp/tmp5NFLHk.qml', '--desktop_file_hint=/home/phablet/.local/share/applications/tmpH8aT0a.desktop']
}}}

Traceback (most recent call last):
  File "ubuntuuitoolkit/tests/__init__.py", line 79, in setUp
    self.launch_application()
  File "ubuntuuitoolkit/tests/custom_proxy_objects/test_flickable.py", line 200, in launch_application
    app_type='qt')
  File "/usr/lib/python2.7/dist-packages/autopilot/testcase.py", line 264, in launch_test_application
    return self._launch_test_application(launcher, application, *arguments)
  File "/usr/lib/python2.7/dist-packages/autopilot/testcase.py", line 354, in _launch_test_application
    pid = launcher_instance.launch(application, *args)
  File "/usr/lib/python2.7/dist-packages/autopilot/application/_launcher.py", line 210, in launch
    self.process = self._launch_application_process(app_path, *arguments)
  File "/usr/lib/python2.7/dist-packages/autopilot/application/_launcher.py", line 228, in _launch_application_process
    cwd=self.cwd,
  File "/usr/lib/python2.7/dist-packages/autopilot/application/_launcher.py", line 267, in launch_process
    **kwargs
  File "/usr/lib/python2.7/subprocess.py", line 710, in __init__
    errread, errwrite)
  File "/usr/lib/python2.7/subprocess.py", line 1327, in _execute_child
    raise child_exception
OSError: [Errno 8] Exec format error