these 2 derivations will be built:
  /nix/store/gjx085rss8s7vhkqgyf73nl5ph34fppk-nix-grpc-store-0.2.3.drv
  /nix/store/r0kahzj5hrwk9m02mm8lbsqd4drbyw9m-nix-grpc-store-exit-stress.drv