these 2 derivations will be built:
  /nix/store/a63yvcpbrf6zbw9hjywgdryc2qygvn8z-nix-grpc-store-0.2.2.drv
  /nix/store/5ga7317bb882rbndffadyx4jx09szi5a-nix-grpc-store-exit-stress.drv