these 3 derivations will be built:
  /nix/store/528ls3gizglmy1rzhg23qil298z2gl99-treefmt.toml.drv
  /nix/store/pvdimz0h2di6j3glhn9kas91s83drhf8-treefmt.drv
  /nix/store/aq3fn42sjrsfl559bnxcbj40a0yq8fcj-treefmt-check.drv