these 2 derivations will be built:
  /nix/store/q1m7852d2ii7d91ajxzyzjxm2h7f3g40-nix-grpc-store-0.2.3.drv
  /nix/store/01s7ls90ld4qj67lmw0si25wagl2blw7-nix-grpc-store-dispatcher.drv