these 3 derivations will be built:
  /nix/store/l86j934h322zlch64vfg1gygyrpiq0pg-treefmt.toml.drv
  /nix/store/3rjqj1nchkynk7w2yymbdm3y4vysd1pg-treefmt.drv
  /nix/store/xv9cbr2sfhs66vm8da47hz73pqzqs9zj-treefmt-check.drv