these 2 derivations will be built:
  /nix/store/59myvywj5jc894qcqz37yq4a0k5wkgfb-nix-grpc-store-0.2.2.drv
  /nix/store/5ca2scam5fpwgrxdyhs809k8f8gmnfk5-nix-grpc-store-exit-stress.drv