The confusing part was the non-idiomatic English "builds X to Y" instead of "builds Y from X". Edit: perhaps it is idiomatic somewhere in the world to say "bui

The confusing part was the non-idiomatic English "builds X to Y" instead of "builds Y from X". Edit: perhaps it is idiomatic somewhere in the world to say "builds X to Y", but not in the U.S., in my experience. Could be similar to British "different to" as compared to American "different than" or "different from".