these 3 derivations will be built:
  /nix/store/l7jd4sfslvvz3ag5sjw3953s1kqayxqn-treefmt.toml.drv
  /nix/store/zfdk43zflmz34dc3wdz863qf5gd8h5f5-treefmt.drv
  /nix/store/bkx6d0gi1d02jcf23p2wbrs1vjma6dwx-treefmt-check.drv