these 2 derivations will be built:
  /nix/store/qmniiwc4r5j9vd4fvn83ri19wi20kscp-nix-grpc-store-0.2.2.drv
  /nix/store/wpnyccn2ns0imavi4w7317mvdxz2qv4l-nix-grpc-store-dispatcher.drv