That's an odd one. Only thing I can think is maybe it's trying to install it for Python 2.7, not Python 3?
@Gordon started
Espruino is a JavaScript interpreter for low-power Microcontrollers. This site is both a support community for Espruino and a place to share what you are working on.
That's an odd one. Only thing I can think is maybe it's trying to install it for Python 2.7, not Python 3?