these 3 derivations will be built:
  /nix/store/4smr443czvl3vsr20zy9lfz1qah75i17-treefmt.toml.drv
  /nix/store/adm4gf4azqi7bdyiacsk35qih5fhfn19-treefmt.drv
  /nix/store/fczrvilimn4gk6wb28pcn9gwvsziyw1c-treefmt-check.drv