{ inputs, self, ... }:
{
  perSystem =
    { pkgs, system, ... }:
    {
      devShells.infra =
        let
          treefmt = pkgs.callPackage ./_treefmt.nix { treefmt-nix = inputs.treefmt-nix; };
        in
        pkgs.mkShellNoCC {
          inputsFrom = [ self.devShells."${system}".common ];
          packages = [ treefmt ];
        };
    };
}