these 3 derivations will be built:
  /nix/store/7z62d3amji6s5abpx22ks9fm9r259bm8-treefmt.toml.drv
  /nix/store/0wdy8x8mz8p599mga67r0b92m31af5hd-treefmt.drv
  /nix/store/3sgnzhg5k2nl77r93chs5nvwdqagl0n2-treefmt-check.drv