these 3 derivations will be built:
  /nix/store/n3kb74nal3dzkhsl00r71b7k0mpwb2fr-treefmt.toml.drv
  /nix/store/yfy1k5i363975h6sm57k0624qdghsjis-treefmt.drv
  /nix/store/g2n7lad0miyi0y15f185w3fsiv517rx1-treefmt-check.drv