these 2 derivations will be built:
  /nix/store/9wbq7b86sxg4yr9aznw3kd0yn8abpka1-nix-grpc-store-0.2.2.drv
  /nix/store/4q2m9fbpjsq00ka9kcgqrjzfcwdwag61-nix-grpc-store-exit-stress.drv