these 3 derivations will be built:
  /nix/store/pcl2y4809fyglszgg33arnqvycymy2wa-treefmt.toml.drv
  /nix/store/j19k5k2x5q3bbnx1ayg6zmnpy0yd3fbw-treefmt.drv
  /nix/store/n6n6dvyiwagv5rn0z0h1iw946nlq2grn-treefmt-check.drv