these 2 derivations will be built:
  /nix/store/8pjdpi2bmp6i4mnh212znip6cfvgz333-nix-grpc-store-0.2.0.drv
  /nix/store/4xg6nka9zjh7xidv92y8a9sdaq50szg5-nix-grpc-store-exit-stress.drv