these 2 derivations will be built:
  /nix/store/6xbgkjzrhcx0crfsmfykwzkbinpasw7b-nix-grpc-store-0.2.3.drv
  /nix/store/0m1bdl8f5pxbldm4khpzd8fwimjbcbyi-nix-grpc-store-exit-stress.drv