It could work with Guix: it already works as a universal package manager on top of your distro (with reproducible builds, rollbacks, potentially sandboxed…) and

It could work with Guix: it already works as a universal package manager on top of your distro (with reproducible builds, rollbacks, potentially sandboxed…) and it works with channels: the official one, and others for non-free software etc. I use it on top of Debian to get the recent version of Emacs and some dependencies (vterm). (https://guix.gnu.org/ https://guix.gnu.org/)