these 2 derivations will be built:
  /nix/store/rnk7znpl83vdw3iz682rr20p24vfr08n-nix-grpc-store-0.2.2.drv
  /nix/store/2gqim99l54c6q9iljs5gxy3qpcjx88px-nix-grpc-store-dispatcher.drv