these 2 derivations will be built:
  /nix/store/r3r2pa45m47w5bj8isbgl7wf1iwglf5f-nix-grpc-store-0.2.2.drv
  /nix/store/l64a2sbxhmbii73lqkqcv2jmlvswa1h5-nix-grpc-store-exit-stress.drv