these 2 derivations will be built:
  /nix/store/dqg8xrrzdb6sw6jvrkm0c5d5c341rw34-nix-grpc-store-0.2.0.drv
  /nix/store/8lkwg9v0z2z0jk4xy9g66ffb30ahcd55-nix-grpc-store-exit-stress.drv