[binarybanana]

FWIW for portage (Gentoo) there is g-sorcery[0], which can create ebuilds for Emacs (m/elpa) and python packages automatically. Similarly there is also cargo-ebuild[1] which can create ebuilds for rust programs/libraries, including a list of all dependencies with hashes.

I've successfully used cargo-ebuild in the past to create ebuilds automatically, it's a breeze. I'd be surprised if similar tools didn't exist for deb/rpm based distros.

I'm always surprised how many problems people have with python on other distributions. On Gentoo I can install multiple versions at the same time, install libraries for any of those or just a specific python version of my choosing (including pypy), set a default python implementation (pypy) and of course I can pick the version of the libraries I need, too. It's not as flexible as nix, but quite close. Not a python dev though, so YMMV.

[0]:https://github.com/jauhien/g-sorcery

[1]: https://github.com/cardoe/cargo-ebuild