these 2 derivations will be built:
  /nix/store/87yc1k8rr4v98ncsmdbvahdashz8c91m-nix-grpc-store-0.2.3.drv
  /nix/store/rzv14zy1s48hbcg5r8bv4qbki7hxa9r0-nix-grpc-store-dispatcher.drv