these 2 derivations will be built:
  /nix/store/hznjfwxqyqyxarrrp0rwcgv4vj8vw1l9-nix-grpc-store-0.1.0-beta.1.drv
  /nix/store/nm0lgpqddmvp9krhmfn3znd32jbgb41v-nix-grpc-store-exit-stress.drv