these 3 derivations will be built:
  /nix/store/gk2nj94khhwfac41h4f4i2jqzciyy409-treefmt.toml.drv
  /nix/store/p1x9fgark06g95gx8vz3bxfi9xw2fh0y-treefmt.drv
  /nix/store/k2fr4pl8x9j1hlc3r1kicc45w9wdzdjq-treefmt-check.drv