these 2 derivations will be built:
  /nix/store/jn2f1h3kf0bd570fd7ndv6ib0kkfhzqh-nix-grpc-store-0.1.0.drv
  /nix/store/kwdp9170m0afnzk8i8i1qnad2jsw2s2b-nix-grpc-store-exit-stress.drv