Setting one biome throughout the overworld

I am trying to make the biomesoplenty:wasteland be the only biome in the overworld. I am currently using this script: json { "dimensions": { "minecraft:overworld": { "type": "minecraft:overworld", "generator": { "type": "minecraft:noise", "settings": "minecraft:overworld", "biome_source": { "type": "minecraft:fixed", "biome": "biomesoplenty:wasteland" } } }, "minecraft:the_nether": { "type": "minecraft:the_nether", "generator": { "type": "minecraft:noise", "settings": "minecraft:nether", "biome_source": { "type": "minecraft:multi_noise", "preset": "minecraft:nether" } } }, "minecraft:the_end": { "type": "minecraft:the_end", "generator": { "type": "minecraft:noise", "settings": "minecraft:end", "biome_source": { "type": "minecraft:the_end" } } } } } The problem is that the biome generates, but there is grass and dirt, which should both be replaced by biomesoplenty:dried_salt. Everything else is how it should be...