these 3 derivations will be built:
  /nix/store/9vy5sznjm5hvfc1f801aym0f9hrh0nq9-treefmt.toml.drv
  /nix/store/acds30g758rxfymb8916sgl5qkiqjnni-treefmt.drv
  /nix/store/vz24g95dnvpq5ckkcnmpmvq4bv9jv7s9-treefmt-check.drv