these 2 derivations will be built:
  /nix/store/y2jjgq3hxzkgj15qx9mb06rq5fmi35y2-nix-grpc-store-0.2.3.drv
  /nix/store/yrcasn05abxds6mwj80zkgjdifllghcp-nix-grpc-store-exit-stress.drv