these 2 derivations will be built:
  /nix/store/gldsw3ngd3rzdgpd6vd0mw84y6c2bc3r-nix-grpc-store-0.1.0.drv
  /nix/store/l92w4a9265ggzvs69r74crs4xnqcdz8h-nix-grpc-store-exit-stress.drv