these 3 derivations will be built:
  /nix/store/a32p2p3d5w358nvf8vkp1l3f36sfgywy-treefmt.toml.drv
  /nix/store/nwff10j9igjwd35ng3514si3hyk1br4q-treefmt.drv
  /nix/store/ssrbilg4ns87jzxsfj8gm8lfxs9sg355-treefmt-check.drv