Traceback (most recent call last):
  File "/usr/bin/zeitgeist-daemon", line 175, in <module>
    start_datahub()
  File "/usr/bin/zeitgeist-daemon", line 115, in start_datahub
    flags=glib.SPAWN_SEARCH_PATH | glib.SPAWN_STDOUT_TO_DEV_NULL | glib.SPAWN_STDERR_TO_DEV_NULL)
GError: Failed to execute child process "zeitgeist-datahub" (No such file or directory)