these 2 derivations will be built:
  /nix/store/4z0awkxsi4wx4mh8c5ryq5rnv4lfmri0-nix-grpc-store-0.2.3.drv
  /nix/store/api5pj3akr6yj1dv73x0rwaag58gcw9k-nix-grpc-store-exit-stress.drv