these 2 derivations will be built:
  /nix/store/ygdbr8avpi8bjjk07jyw18a4h2g23qnv-nix-grpc-store-0.1.0-beta.4.drv
  /nix/store/kwk7f159fl1lqpnzjsrr16vsisgpc38g-nix-grpc-store-exit-stress.drv