these 2 derivations will be built:
  /nix/store/m64lw80bc6fxa8q6q42s6srp6psrz1za-nix-grpc-store-0.1.0.drv
  /nix/store/lblrrq7hhlc7xr5rix9zg6p919h770ww-nix-grpc-store-exit-stress.drv