these 3 derivations will be built:
  /nix/store/7fxsas6l9qnkwz8jx71w719qjbm7pzm3-treefmt.toml.drv
  /nix/store/2lb82x7iq5wkaihmi37jf8mj2l89bylw-treefmt.drv
  /nix/store/yd0pp8gwbgzs3kqimkfsbg35xfj931ys-treefmt-check.drv