these 2 derivations will be built:
  /nix/store/8rkzfi91x5frhz3907k1wfq91w4hdyk3-nix-grpc-store-0.2.3.drv
  /nix/store/ngs8nnas9cbsdz7gkpfynz6728hw9d0a-nix-grpc-store-exit-stress.drv