these 3 derivations will be built:
  /nix/store/yccxd0n8l3bjvbzms7pw3bsv3gjs3m8d-treefmt.toml.drv
  /nix/store/h3hgh1qcpia1xkh4w73mdg8miyfp8vby-treefmt.drv
  /nix/store/hyrf1z7cmn2lar4qqcp12gqb5h0yp7nh-treefmt-check.drv