these 2 derivations will be built:
  /nix/store/hl1lwxk1vhsjifg7wsg0drpq3bxbafi1-nix-grpc-store-0.2.3.drv
  /nix/store/ksnhkwg5ip4swassf22mxfqscv0afzw2-nix-grpc-store-dispatcher.drv