these 2 derivations will be built:
  /nix/store/hgrzwf8k1245diin2wzbn6d125khi7xy-nix-grpc-store-0.2.2.drv
  /nix/store/90hr22a8c7ay8nsjzrsidq9hv6cs5rnl-nix-grpc-store-dispatcher.drv