1  { lib, pkgs, ... }:
 2  
 3  {
 4    tree-root-file = "treefmt.nix";
 5    on-unmatched = "fatal";
 6  
 7    excludes = [
 8      "*.lock"
 9      "*.md"
10      "LICENSE"
11    ];
12  
13    formatter.nixfmt = {
14      command = lib.getExe pkgs.nixfmt-rfc-style;
15      includes = [ "*.nix" ];
16      options = [ "--strict" ];
17    };
18  }