these 2 derivations will be built:
  /nix/store/4xvchd1d4vnzqh6hww40krq89f5187wj-nix-grpc-store-0.1.0-beta.1.drv
  /nix/store/qlzs3s22qkhfm0fgq1q9f2vvi9x5sdwp-nix-grpc-store-exit-stress.drv