these 3 derivations will be built:
  /nix/store/k2n8zvyj1zqbzi8cbmziqkmapxjshzw9-treefmt.toml.drv
  /nix/store/dnnykp1zsl5ks7i0n5fx3c25szmgz4lx-treefmt.drv
  /nix/store/5sqcdairm0g9n3d8qwnxvgg129kd5bxn-treefmt-check.drv