these 3 derivations will be built:
  /nix/store/m9hr0ia2qihiv5332zq31cg5zrkg984k-treefmt.toml.drv
  /nix/store/lfvpy3hggc9h733qhw9kw7jlgbshl9fw-treefmt.drv
  /nix/store/mhrhj80d4vhch604fja4ksj7akibpmwl-treefmt-check.drv