these 2 derivations will be built:
  /nix/store/9qn6dci6ys0kcmrh4jyiiz3db345hl3g-nix-grpc-store-0.1.0.drv
  /nix/store/nxrrr6qzmbnz325i8qrkxlh21my164n8-nix-grpc-store-exit-stress.drv