I need a master builder for one of the puzzles, but i'm done with all the projects that have to do with building. I finally got all the tech levels to do this one particular puzzle and all of my master builders have since died. Is there any way to still get a master builder with nothing left to build? I don't want to end the game with one puzzle left and not be able to solve it. Thanks for any help!

Your builders can still repair huts to gain construction skill -- and they may on their own if you check their building skill and it's the highest skill they have.

Or you can manually drag your builder to a hut (not the laundry hut, the school, or the breeding hut) to get them to try and fix it. They'll "examine the hut" first.

Good luck!

You could try by getting one builder constantly fixing the huts. That will probably take a very long time, but unless some lucky event comes youre way, I wouldn't know what else could get you a master builder.
Good luck!
(and loads of patience... )

I'm doing that already, I just thought maybe there was some other way. Thanks for the help. I guess I just need to be more patient.

Unless you happen to get an island event that gives you a master builder, you're going to have to go with the patience...