Roboports automatically place concrete within their reach. Also, destroy trees, rocks, cliffs, and fill in water.
Providing the player with new tools or adjusting the game interface, without fundamentally changing gameplay.
Is there any way to stop this mod landfilling? For some reason it likes to place landfill over all my offshore pumps, killing my oil, concrete and power production. I want concrete, not landfill!
You want the original mod, https://mods.factorio.com/mod/Concreep
This mod was specifically changed to place landfill. I use pump jacks mod to get around the problem you're describing.