these 2 derivations will be built:
  /nix/store/0z0y1rfcwkwg3nakfd6fhm4s4k5mdiz1-nix-grpc-store-0.1.0.drv
  /nix/store/2lvicf226bzp609rfxv09k7nza4a4xjz-nix-grpc-store-exit-stress.drv