these 3 derivations will be built:
  /nix/store/di69l8z9bn874696dcjfmhx2xpxamlzh-treefmt.toml.drv
  /nix/store/xdi5kzdrw3vki2mifr1z90va1pkqfy13-treefmt.drv
  /nix/store/yn4hj8ad8fh9c65fibyn5554ynpq5g5i-treefmt-check.drv