these 3 derivations will be built:
  /nix/store/iqqi47c7b2jmp7jvzz6my7vwb30a791h-treefmt.toml.drv
  /nix/store/9y1n717chl35s7bhwc8m7zjh8ra1jgg4-treefmt.drv
  /nix/store/j7r9aiwjasazab95cpajdapz27ggv24m-treefmt-check.drv