Deprectaed, see blog post about Zariz.

Either execute the commands manually: drush process-waiting-queue dekyll_clone -v & drush process-waiting-queue dekyll_export -v &

Or, execute the bash command . ./dekyll.sh

That's a dot followed by a space. This causes the currently running shell to interpret the script, instead of launching a subshell. The jobs will then be accessible from the standard job control, using the "jobs" command.