these 2 derivations will be built:
  /nix/store/q1m7852d2ii7d91ajxzyzjxm2h7f3g40-nix-grpc-store-0.2.3.drv
  /nix/store/32yjm0fg500brrk6z9m7ahqrvw6cl67k-nix-grpc-store-exit-stress.drv