these 3 derivations will be built:
  /nix/store/x9mq01qya8k1ql2pb1lnvfp6imvf8az3-treefmt.toml.drv
  /nix/store/0iinan4ji60rsrz9ay99va8dhcy221bc-treefmt.drv
  /nix/store/87wf7p7ff1iav7z8gzc8bllnr01w22db-treefmt-check.drv