these 2 derivations will be built:
  /nix/store/f8wbsb56kyavgs5768d92hgzhq6habkm-nix-grpc-store-0.2.3.drv
  /nix/store/99vwrmpzb0jyny90hh7xrilsyk5qy3sd-nix-grpc-store-exit-stress.drv