these 2 derivations will be built:
  /nix/store/6jvv0j3qzgacipp1i4d5brh33jy3vhsi-nix-grpc-store-0.2.0.drv
  /nix/store/3v4aym8q6nh7hwz7hjxdiqlxxi7f63lh-nix-grpc-store-dispatcher.drv