these 2 derivations will be built:
  /nix/store/wdxw31arazksznbg4nqc4afkl63mxy31-nix-grpc-store-0.1.0.drv
  /nix/store/r2zgkw8ifkr08hlrcbxh9ax4zrlpmcil-nix-grpc-store-dispatcher.drv