these 3 derivations will be built:
  /nix/store/x3pg5wyh2qnkxbffvxw12arr6xjcnxmd-treefmt.toml.drv
  /nix/store/75gm32n42sygmmbripmx2qzmiv9z6p9h-treefmt.drv
  /nix/store/wwnq6xmr47m2xmnl755asn5aj1b388fj-treefmt-check.drv