these 2 derivations will be built:
  /nix/store/mp6nnhycxpp0dhcs44a42cgcb7mhzkbx-nix-grpc-store-0.2.3.drv
  /nix/store/ln5xxsnp204dmyhxrsqf7ga5jz16pdlq-nix-grpc-store-dispatcher.drv