Enter your lab to design your blueprints. Minor quickfix suggested by 4M_Peri
Providing the player with new tools or adjusting the game interface, without fundamentally changing gameplay.
Clearing the lab doesn't remove landfill, I don't have any landfill removal mods (maybe I should get one?).
This also applies to any nuke-craters.
I made a fork to fix that. https://mods.factorio.com/mod/BlueprintLab_Henriquelay