these 3 derivations will be built:
  /nix/store/4jzs8rar0slm37p6rs8q27ixg1njrxnf-treefmt.toml.drv
  /nix/store/7x26pc1c8z824sgvwc72xh5a3h3ggwc1-treefmt.drv
  /nix/store/qq894yi1kzl6wag7d4yj1c7bl2sm19qa-treefmt-check.drv