Tried to play with this, but it has a missing dependency. Can you explain what other mod it needs?

Sadly the game only builds the tech tree when you start a new game, so yes you need a new game. :(

do you have to start a new game for it to work?

Thank you!

Thanks for the info @LeoPerGustav I'll see what I can do about improving the way it interacts with the breakthrough.

Update after further testing: If you ignore the breakthrough techs (for these domes) and only research the techs in the engineering branch, it works fine. (So, you basically risk wasting one or two breakthrough spots, but on the up, you'll always be able to build the domes.)

There's a drawback: if you get one of them as a breakthrough, and research that first, you still won't be able to build the dome until you also research the corresponding tech in the engineering branch (i.e. you'll need to research it twice). I don't know if it works the same the other way around, if you research the engineering tech first, before the breakthrough one.
If you *only* have it in the engineering branch and research that, it works fine.

Under which category is it supposed to show up in game? I can't see in dome section...
... or will it show maybe only in a new game and won't be added in older existing saved games?