these 2 derivations will be built:
  /nix/store/123rqhxsswvw2ihlmrbxb8f6hxzgh82c-nix-grpc-store-0.2.2.drv
  /nix/store/7hnk905k0qaj48cg1ymvj7724kfc6ryk-nix-grpc-store-dispatcher.drv