Settlement: How do I fix this?

https://preview.redd.it/0w6hzkftaw4g1.png?width=1865&format=png&auto=webp&s=109f78efb4c94e6951d613700cb12d1e3b81e994

So I just claimed this settlement and it wants me to build the overseer's office under this conveniently placed hill. Anyone know a way to actually access and build it or yeet the settlement from my purview? I've tried to abandon the overseer position but it states objectives are not completed. Kinda hard to do that when...