these 2 derivations will be built:
  /nix/store/p1sybs60r51w0y7knlqs27b0bn6yx4ka-nix-grpc-store-0.2.2.drv
  /nix/store/hrawplhbr45yf5jf3mrpqgjf427jdv7v-nix-grpc-store-dispatcher.drv