these 3 derivations will be built:
  /nix/store/mci0wv46qhh6syjnpfqh6ij1gp2v14hb-treefmt.toml.drv
  /nix/store/qvsf2rxk20ksiazqpr794ppha78jd7fh-treefmt.drv
  /nix/store/dvw6xwp836aj0hw347pq0vs2b0fyz51g-treefmt-check.drv