these 2 derivations will be built:
  /nix/store/hqnwnv7yahh2hfwp0rbqan1abcv8s81j-nix-grpc-store-0.2.3.drv
  /nix/store/84nwx0gyf7zv88y7i7rhdnsag6ybwqp8-nix-grpc-store-exit-stress.drv