these 2 derivations will be built:
  /nix/store/am55gd4270n26w0fn42xhabvpf7ckagw-nix-grpc-store-0.2.3.drv
  /nix/store/6xxgwsj4g9mxfwhk6xfs0dckl4nwx5p0-nix-grpc-store-exit-stress.drv