these 2 derivations will be built:
  /nix/store/5b6mhjyqlslgcjzynak69b8ij7gs0q9b-nix-grpc-store-0.1.0.drv
  /nix/store/rflnw602vm9y5bal51r6pikap1cds558-nix-grpc-store-exit-stress.drv