these 2 derivations will be built:
  /nix/store/nx7k1mfyia2fmyvw25xarx2wky63lygx-nix-grpc-store-0.2.3.drv
  /nix/store/clfm31qi8hp08yig38zxr64w0zmrz392-nix-grpc-store-exit-stress.drv