these 2 derivations will be built:
  /nix/store/2cnkp0fkyimawigy6ypdbyl4im3fv93l-nix-grpc-store-0.2.3.drv
  /nix/store/lb609m87ylfss11slwjb81rprvhx6ng3-nix-grpc-store-exit-stress.drv