# treefmt-nix module: wires up `nix fmt` and the `formatting` check. _: { perSystem = _: { treefmt = { projectRootFile = "flake.nix"; programs.rustfmt.enable = true; programs.nixfmt.enable = true; programs.deadnix.enable = true; programs.statix.enable = true; programs.taplo.enable = true; }; }; }