these 2 derivations will be built:
  /nix/store/lzzl89xwfnv1avv9c1hi4lmqyhacqx5h-treefmt-with-config-2.6.0.drv
  /nix/store/fbr9iq84i1irkgyigbxvvbd5xylf9rpr-treefmt-with-config-check.drv