these 3 derivations will be built:
  /nix/store/fplsrf8q66rh4qaykn9h3x17w3p1zm57-treefmt.toml.drv
  /nix/store/f6sqasl4qv9jznh6g2wjkv8jjy0md2jb-treefmt.drv
  /nix/store/hndk6z9jf891dgx8j2fh4nwlwvs9ag5c-treefmt-check.drv