{ ... }: { imports = [ ./nixpkgs.nix ./overlays ]; nix = { gc = { automatic = true; dates = "weekly"; options = "--delete-older-than 20d"; # Catch up on missed runs due to being powered off persistent = true; }; #Deduplicate identical files in the store regularly optimise = { automatic = true; }; settings = { experimental-features = [ "nix-command" "flakes" ]; }; }; }