You would have to build your own binary using the documentation here : https://github.com/espruino/Espruino
Once you've followed the steps in the Readme, just type make clean;MAPLEMINI=1 RELEASE=1 make
make clean;MAPLEMINI=1 RELEASE=1 make
@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.
You would have to build your own binary using the documentation here : https://github.com/espruino/Espruino
Once you've followed the steps in the Readme, just type
make clean;MAPLEMINI=1 RELEASE=1 make