these 2 derivations will be built:
  /nix/store/c3064qhm7956crv71z2p85m456f2hyxg-nix-grpc-store-0.1.0.drv
  /nix/store/hjqwpa9gfxc2464nh5365yfv5z8vl4gn-nix-grpc-store-exit-stress.drv