You can make it out of air in an oil refinery (which is implied to be a general-purpose fractional distillery) and dump the excess nitrogen. Or, if you also need hydrogen, you can split water using acidic or alkali electrolysis.

One thing that hindered my progress with this mod is the need to size the individual production lines. Due to XM's complexity its footprint tends to be very large with indefinitely scalable designs. Since I like to play with enemies on, footprint matters. Optimizing it involves calculating the requi...

Love this mod! Played 1.2.2, got to the electric furnaces and the nickel/calcium block. Awesome work, that's what Factorio needed. I've been thinking about how to deal with the lockouts. I think it would be in the spirit of the mod to do it like it would be done in the reality: once some technologic...