these 3 derivations will be built:
  /nix/store/lj81bycihvj35napllkmy7bjdy1l4vl2-treefmt.toml.drv
  /nix/store/9f48g47rwrhvdrfkhr9gkrc7c50isg5a-treefmt.drv
  /nix/store/9dsxa9x72kqlyls1376z6k5amdygpnzi-treefmt-check.drv