these 2 derivations will be built:
  /nix/store/c1p5s1n91im27hdnwp4n0gzz6rqgfcfx-nix-grpc-store-0.2.3.drv
  /nix/store/78gi5d9vpp7bzb9d4s5qvx9ffzl7gdap-nix-grpc-store-exit-stress.drv