these 2 derivations will be built:
  /nix/store/95q4xv0qkpcd3dv7amkgymn1av8d873c-nix-grpc-store-0.1.0-beta.4.drv
  /nix/store/p2yab2sx0zk340np95ppna5pr7fv163i-nix-grpc-store-exit-stress.drv