these 2 derivations will be built:
  /nix/store/8frj8h18690qidc96nna73svg5lyp19m-nix-grpc-store-0.2.3.drv
  /nix/store/a4w9rx8hdmqdsb2038yl880bvgac9ily-nix-grpc-store-exit-stress.drv