these 2 derivations will be built:
  /nix/store/yyrqyn49xsnmjkd50lgy386rx3vw1gh1-nix-grpc-store-0.2.2.drv
  /nix/store/vnybilkn90ljqw6mwm401da1g0c0yj67-nix-grpc-store-exit-stress.drv