I use Emacs with Nix, which parses my config for use-package declarations and installs them for me. Emacs packages are pinned the same way as anything else in N

I use Emacs with Nix, which parses my config for use-package declarations and installs them for me. Emacs packages are pinned the same way as anything else in Nix and, as a bonus, it can also manage non-Emacs dependencies. I wouldn't recommend Nix just for a reproducible Emacs config, but if you end up considering Nix for broader reasons, being able to use it for Emacs could be a nice bonus :)