these 3 derivations will be built:
  /nix/store/3srxhx7kyaagidsxbkhi3w7xm3lxr5ni-treefmt.toml.drv
  /nix/store/krfda9lgjpl565f02cvqqz2dy3gjn736-treefmt.drv
  /nix/store/hc8f9cqqwnaiz7861533ni82wsip8h3m-treefmt-check.drv