these 3 derivations will be built:
  /nix/store/7j014w8k2zmzjby9pfr82ny8ckbmh9gj-treefmt.toml.drv
  /nix/store/yk0c0zmqzflqp126mp5fj67wj4rfz2d4-treefmt.drv
  /nix/store/v9l5a6ny727pnlb89xl9i5viy75df5rr-treefmt-check.drv