these 3 derivations will be built:
  /nix/store/lxkk0amn2sdnwrnbfyqd0rldgh18qy4z-treefmt.toml.drv
  /nix/store/519rimz9h46yrq15r3vy8xrb7v0hw2m0-treefmt.drv
  /nix/store/jnyrk3skb9rfw23g6s34v34dlkg0458l-treefmt-check.drv