these 2 derivations will be built:
  /nix/store/xvn7gv131gr925qdhz26jddy5nnk8qha-nix-grpc-store-0.2.2.drv
  /nix/store/vmjnga22fj14gcvnlh68agwp7243w17w-nix-grpc-store-exit-stress.drv