these 3 derivations will be built:
  /nix/store/v1widc0qar4p347azr92l1gszpp7xygi-treefmt.toml.drv
  /nix/store/ddk0mrgmhg2mc4pmi2xp7rfszk1mgdr5-treefmt.drv
  /nix/store/6hcigcdjm98grkg54bf78yz6d8i18grp-treefmt-check.drv