these 2 derivations will be built:
  /nix/store/ji3np11pgg06smvp1hkbw38g71qdhnvw-nix-grpc-store-0.2.3.drv
  /nix/store/99yxmfnvh5wgv4klqsjsfz1qf0rih62f-nix-grpc-store-exit-stress.drv