these 2 derivations will be built:
  /nix/store/5y9sanw3fjmxvnvjk6haajadnvxr2qvc-nix-grpc-store-0.2.3.drv
  /nix/store/jg7c30ff83prm0anccgbir22sgg9c8l8-nix-grpc-store-exit-stress.drv