these 2 derivations will be built:
  /nix/store/ywxzch8y2y0frfpm1rmjcxlhn28apfbq-nix-grpc-store-0.2.3.drv
  /nix/store/bx9nhwz7kmczc7r7bxj506j5vdk3m6ab-nix-grpc-store-dispatcher.drv