That's easy: run "./flite" instead of simply "flite".
For programs to be run simply by their name, they must be in one of the directories specified in the PATH environment variable. To list them, type "echo $PATH".
z.
Unfortunately, it is not that easy if your are using OZ 3.5.1.
There it runs, but produces incomprehensible speech.
Somewhere, I saw that it has something to do with the sample rate of the dsp,
I am not finding the discussion. This is a very nice program that
should be included in Z feeds. Unfortunately, I am not able to make that
contribution at this time.