Preheat oven to 350 °F.
In a medium bowl, combine the flour, nutritional yeast, baking powder, salt, garlic powder, smoked paprika, and turmeric. Mix well.
Add the olive oil, butter, and lemon juice, mixing with a fork until the dough is fine and crumbly.
Add the water a tablespoon at a time until the dough becomes cohesive.
Transfer the dough to a piece of parchment paper large enough to fit a large rimmed baking pan.
Top the dough with another sheet of parchment paper and roll out the dough until thin, measuring about 11 x 13 inches.
Transfer the parchment paper and rolled-out dough to a large rimmed baking sheet.
Remove the top sheet of parchment paper and cut the rolled dough into 2-inch squares.
Bake for 15 to 17 minutes, or until the crackers are baked but not browned. The color should be golden.
Cool completely on the baking sheet.
