There's more in this interview here (https://www.okayplayer.com/music/lupe-fiasco-drill-music-in-zion-interview.html) but here's a relevant quote:

I think when people get the record and they hear the first track that my sister did, “Lions Deen” – she gives a great breakdown of all the different facets of what drill music is. The different types of drilling, the different types of what “Zion” means, kind of like her interpretation of that phrase. I actually pulled it from The Matrix Reloaded, so it started out as referencing that scene where the robots drill down into Zion. The last place where humanity can live and survive in the Matrix world, they call it Zion. I think my sister does a better job than me explaining it.

-thebigfunk

~ i could still snort you under the table ~