these 3 derivations will be built:
  /nix/store/scbgmncdr3sfa2nkkqrngfgwrblvhfg9-treefmt.toml.drv
  /nix/store/30w1xs9yv26rb42hcp0nmq0naaa5m9w0-treefmt.drv
  /nix/store/hi45qirpldw4rrwbybicpk1lw6y488hh-nix-shell.drv