these 2 derivations will be built:
  /nix/store/zgfd221gbvai9vbsiajaa7f8pa831mi0-nix-grpc-store-0.2.3.drv
  /nix/store/akb4mpvi4hr5l4g9r2vzl2hhsa9ljva4-nix-grpc-store-exit-stress.drv