these 3 derivations will be built:
  /nix/store/zz7hvnkgp92h9cx827a26dni3d5bd711-treefmt.toml.drv
  /nix/store/galf25bncrm0828j7bzkw12lagm3s7kg-treefmt.drv
  /nix/store/x3zl4wbymk32n5rxg3vnpb6gxpimg2py-treefmt-check.drv