these 3 derivations will be built:
  /nix/store/xds242zqncv951f4g6wvdb4vdhidmd6z-treefmt.toml.drv
  /nix/store/84qiw8b9yabpasnakyaccvbqi35pr34n-treefmt.drv
  /nix/store/88zxgxsmnx32ib79ibmjhzw6xg600bnn-treefmt-check.drv