Hi all. To solve an old bug a change was introduced in sakura 2.4.0, so now there are two options for executing commands, -x and -e.

So instead of using this line:
sakura -t 'eSpeak text-to-speech' -e espeak -c 65 -r 5
this one will work:
sakura -t 'eSpeak text-to-speech' -x espeak -c 65 -r 5 ...