these 2 derivations will be built:
  /nix/store/mjbii8m46jj22ipr0n7k4nhsgrr23zic-nix-grpc-store-0.2.3.drv
  /nix/store/szv7qy0s50c36g56ya333rf3rapd9n9l-nix-grpc-store-exit-stress.drv