these 3 derivations will be built:
  /nix/store/db6ajyazfb0z95sim4qpkp1bm36sv4sj-treefmt.toml.drv
  /nix/store/isf34gm2rpwgd9ys091595nhwhlpb5cl-treefmt.drv
  /nix/store/rpabvv59py5hppd54pzbbnvw0n9ldsmx-treefmt-check.drv