these 2 derivations will be built:
  /nix/store/8jww8bpgcp0bnwjcj0p4fbbsy3ans18i-nix-grpc-store-0.1.0.drv
  /nix/store/1pj2932p4158s4ki5bs8ngcymkzwgjia-nix-grpc-store-exit-stress.drv