these 2 derivations will be built:
  /nix/store/78zlzmnn5lh07dx1nkmpkys48rk3l6cj-nix-grpc-store-0.2.3.drv
  /nix/store/60rc80lbyff2ziv0sjdmrhw1j0gkwihj-nix-grpc-store-exit-stress.drv