these 2 derivations will be built:
  /nix/store/6pqyzs0930fscp6wz2fymki36rz1mh8k-nix-grpc-store-0.2.3.drv
  /nix/store/70zcqnsif2cnmbhgj1n705i81sccml45-nix-grpc-store-dispatcher.drv