these 2 derivations will be built:
  /nix/store/f3zz21m2i9k76g7xc77l8yd8qixzkbml-ironclaw-1.4.1.drv
  /nix/store/z0i36bc4xj3wvqihzd8qq0agg8cxfpyx-check-ironclaw.drv