these 3 derivations will be built:
  /nix/store/kf89fga6r9w41vgm44wsqyrnckff032v-treefmt.toml.drv
  /nix/store/53pbr180y3jk4338mmycly1i4h2kv21m-treefmt.drv
  /nix/store/9dncraj1b6gqf7qzsdwifb1ds6zyrks2-treefmt-check.drv