these 2 derivations will be built:
  /nix/store/m3bqsdrpdc4wb46v0sfg1nhpkbnfmvzf-nix-grpc-store-0.2.0.drv
  /nix/store/nkw0cs46gqdgj4ix9h15lrzlwgxd4k4p-nix-grpc-store-dispatcher.drv