these 3 derivations will be built:
  /nix/store/ivfg2phq818kl9hihmb0f93infpxrcic-treefmt.toml.drv
  /nix/store/8gf07i7zzb31d9vrq364nycmchiz4nc4-treefmt.drv
  /nix/store/5wqdcqjjfkmnr582zyhd1g3rv3rg7jrd-treefmt-check.drv