these 3 derivations will be built:
  /nix/store/0rb5rdc4w6xand12yv8malaly6np5hqh-treefmt.toml.drv
  /nix/store/0a5hqmpqrnq684kafbjyar6fcmm833ff-treefmt.drv
  /nix/store/f0nrgv7s8q3fc0ylaaigi0md38br88mj-treefmt-check.drv