these 2 derivations will be built:
  /nix/store/r78z49pj4vhnk0cry3afcgnh6yjcy9ig-nix-grpc-store-0.2.3.drv
  /nix/store/m6zgs85h3jz3m46f06cw6m9sxqw5jgyq-nix-grpc-store-exit-stress.drv