these 3 derivations will be built:
  /nix/store/x3pg5wyh2qnkxbffvxw12arr6xjcnxmd-treefmt.toml.drv
  /nix/store/75gm32n42sygmmbripmx2qzmiv9z6p9h-treefmt.drv
  /nix/store/60j0f370x5f2lr1mgp40rkfmhxmsz839-treefmt-check.drv