these 2 derivations will be built:
  /nix/store/4kw6gkdb5kysvagb6jm6f66vw0c184hw-nix-grpc-store-0.1.0-beta.1.drv
  /nix/store/vmky4j2vqark2r1vc6iw9086bkavh4mz-nix-grpc-store-exit-stress.drv