these 2 derivations will be built:
  /nix/store/jnnxq8iaaifvmci2mq9pxj799bx06hn9-hol-guard-3.5.0.drv
  /nix/store/z80pjdcjwf4nnab7svk87b0my0zaw8xc-check-hol-guard.drv