these 2 derivations will be built:
  /nix/store/f0116g36pkp93pp2ly5rx5r2lb8a865v-nix-grpc-store-0.1.0.drv
  /nix/store/gfqvnvv8dm0wsy5d4sdl9dxsq2kamys3-nix-grpc-store-exit-stress.drv