these 2 derivations will be built:
  /nix/store/i8w19m88mwc2hrf9yaiygfzpv3h84jpz-nix-grpc-store-0.2.1.drv
  /nix/store/6sdw7cbfbyixcmn2399lmzrnf7ikwcfj-nix-grpc-store-exit-stress.drv