these 2 derivations will be built:
  /nix/store/k5gwmjii4v1qh72q18jyi4fsdn94k8y5-nix-grpc-store-0.2.3.drv
  /nix/store/bv2wdjv7df8ccq34xzgjhg33q70y6lz4-nix-grpc-store-exit-stress.drv