these 3 derivations will be built:
  /nix/store/4c6wz2fynxhxwc0519v6rql7h0qq745h-treefmt.toml.drv
  /nix/store/ndl0vdscv3n68kwpvabwldp80pfmfmyz-treefmt.drv
  /nix/store/kvy8z15xaxs4k3ifmyllq5hsxf78ifr7-treefmt-check.drv