these 3 derivations will be built:
  /nix/store/pa8aa1n41q61bkjs3wz2rhjm4az6449x-treefmt.toml.drv
  /nix/store/4jm6yn7zn8gvgaw38kvj8j7hll38di68-treefmt.drv
  /nix/store/2pfdackrw6lgzfyrgka34hyxvp69d9aq-treefmt-check.drv