Make sure, that python, java and jre is installed on your machine
Check out flow9 repository with something like
git clone https://github.com/area9innovation/flow9
flow9/binto your path. We also require 64-bit Java Runtime and Python in your path.
Check out this repository, change directory to its root
Build metamath.jar with command:
Run a test file with command:
java -jar metamath.jar file=uset-100000.mm