Problem creating .xo bundle

[Art Hunkins]

I've got an XO Activity ready to go, and working perfectly in my (XO) 
Activities folder. (It's called OurMusic.activity.)

I just can't seem to make an .xo bundle of it.

>From my activity's folder (OurMusic.activity) I run:
./setup.py dist_xo
and get:
: No such file or directory

If I run:
setup.py dist_xo
or just
setup.py
I get:
bash: setup.py: command not found
(and setup.py is right there in the folder, with correct permissions.)

Can someone give me guidance, please? (Happy to send along my setup.py, 
MANIFEST and activity.info files if relevent.)

Art Hunkins