these 2 derivations will be built:
  /nix/store/q0dys73i6gnl8rfg1wsihvrn86m2lbcg-nix-grpc-store-0.2.2.drv
  /nix/store/6j80vksbs06vb861zz63p9awvihvf29l-nix-grpc-store-exit-stress.drv