these 2 derivations will be built:
  /nix/store/9k33dbvy5kpbb2gxipxln31kxyjyix2a-nix-grpc-store-0.2.3.drv
  /nix/store/vwc9696x3lhj2l4y458dvkgp9yshz13v-nix-grpc-store-exit-stress.drv