these 3 derivations will be built:
  /nix/store/anan9krx8mcgsf037jp2dwyiq8aczcnw-treefmt.toml.drv
  /nix/store/npcdbdfjs954wsxnih0icl626y7gc601-treefmt.drv
  /nix/store/hm6n682l1z4i724c3py10vgpwc1h7gdx-treefmt-check.drv