these 3 derivations will be built:
  /nix/store/y49nd3qdwbyy1krq91a98abi8h8ar2fj-treefmt.toml.drv
  /nix/store/igskkq4mcqfyqz3hqb1qrfcrpyvhfhzk-treefmt.drv
  /nix/store/swqhlq8aq9fjbvm8w7q862nmrv67y95l-treefmt-check.drv