these 2 derivations will be built:
  /nix/store/77lmgbh7a39b228d356l6w0kzrhhn9s5-nix-grpc-store-0.2.3.drv
  /nix/store/6pqipsapij8ll6c90006icr0a5biv8j5-nix-grpc-store-exit-stress.drv