these 2 derivations will be built:
  /nix/store/s7pk0s70kkwxj0kalbk6m79bgn8mbrxl-nix-grpc-store-0.2.0.drv
  /nix/store/j8rg4jd87dsaydxh5kmnqjp633dnnxx9-nix-grpc-store-exit-stress.drv