Not using Nix but there have been a few libs I've "pinned" in our remote agent by the expediency of simply including the package source wholesale in our app roo

Not using Nix but there have been a few libs I've "pinned" in our remote agent by the expediency of simply including the package source wholesale in our app root. Currently just an old version of PySNMP, but there were others before recent upgrades to cx_Freeze. No doubt there were other approaches, but this one is foolproof.