these 2 derivations will be built:
  /nix/store/3x8di1irff8n6zzw4yyxa3f49kix85j3-nix-grpc-store-0.2.2.drv
  /nix/store/cf4mi5v4fbxvcwp346v7jxclddz59wvh-nix-grpc-store-exit-stress.drv