I was able to place a new Crude Unit on the map on the archive.org version, using the button 3 buttons below the demolition button and finding a empty place on the map, the one shown in this wikipedia screenshot:
One thing that came up in Phil's livestream last night is that new buildings aren't connected to the pipe network, and of course the pipe tool isn't implemented.
Maybe at some point people will reverse-engineer the save file format enough to edit a pipe in though...
https://upload.wikimedia.org/wikipedia/en/2/29/Simrefinery_s...
Unfortunately, clicking the new crude unit does not work, unlike existing crude units on the map.