nix-alien VS mach-nix

copy the extracted files over to the nix output dir, and patch-elf all the binaries to link to the nix-version of the dynamic lib.

This sounds more difficult than it is, the result will be a copied over binary file that has its “libc.so” and other dynamic libs replaced in the ELF-header with “/nix/store/hdjdewuieu737-libc/libc.so”. I recommend looking up a package in nixpkgs which has a similar install story, that’s the easiest way to write a new package.

In case you only want to run it locally https://github.com/thiagokokada/nix-alien and similar programs work fine with the binary.

You might be interested in tools like nix-alien which help, though to some extent it's always going to be an annoyance.

There's also nix-alien to run random binaries and nixos-fhs-compat to FHS your OS (might need some tweaking).

Another way if the above doesn't work is to use mach-nix:https://github.com/DavHau/mach-nix

For python, I can highly recommend mach-nix. Makes it really easy to also keep a requirements.txt to stay compatible with non-nix-users.

The ESP32 toolchain is quite cumbersome to install - even under NixOS. The wiki tells you to create a shell.nix that creates a python virtual env at the first execution. I used DavHau's mach-nix to create esp-idf.nix and subsequently micropython-esp32.nix.

mach-nix and friends are pretty good, but I've found that the expectations of all the commonly-used data science stuff is pretty antithetical to the Nix Way. I'm not sure if it's still the case, but last I tried, Hydra wasn't building CUDA (since it's non-free), so I had to compile that and e.g. TensorFlow and PyTorch. Very painful, even on a beefy system.

I don't do much Python, but usually everything works just fine with mach-nix. I would try something like this: ``` { pkgs ? import (fetchTarball "https://github.com/nixos/nixpkgs/archive/nixpkgs-unstable.tar.gz") { } }:

There are some sifferent/new tools for adding your own Python packages these days. It's still not truly solved, but one of these new package generation tools might serve your better:

poetry2nix: https://github.com/nix-community/poetry2nix

dream2nix: https://nix-community.github.io/dream2nix/guides/getting-sta...

mach-nix: https://github.com/DavHau/mach-nix

pip2nix: https://github.com/nix-community/pip2nix

pynixify: https://github.com/cript0nauta/pynixify

The tools available to you at the time (pypi2nix and maybe python2nix, if it was a long time ago) have been abandoned in favor of the newer tools, I think chiefly poetry2nix but I'm not sure.

There's still the Nixpkgs buildPythonPackage stuff, I think, if your goal is to upstream a lib into Nixpkgs. But if you just want to build your own Python applications and vendorize the deps (e.g., for work), you might try one of the tools above, which weren't available 3+ years ago. Maybe Nixy Python users and developers can reply with some of their experiences using those tools :)

Have a look at mach-nix which is a small utility library for nix to build Python packages declaratively.

final: prev: { xonsh = prev.xonsh.overrideAttrs (old: rec { version = "0.12.4"; src = final.fetchFromGitHub { owner = "xonsh"; repo = "xonsh"; rev = version; sha256 = "0kdps0gf0767zy0fs6qn39rv4z3x7ck0qz1pzx6962593171yk8b"; }; propagatedBuildInputs = prev.xonsh.propagatedBuildInputs ++ [final.python3Packages.virtualenv]; }); python39 = prev.python39.override { self = prev.python39; packageOverrides = python_final: python_prev: { prompt-toolkit = python_prev.prompt-toolkit.overrideAttrs (old: rec { version = "3.0.29"; src = final.python3Packages.fetchPypi { pname = "prompt_toolkit"; inherit version; sha256 = "sha256-vWQPYOjOzXTw3CSXE9QzrOLdxitl7gf5bTWOCxUrbqc="; }; }); }; }; # Using mach-nix to fetch unpackaged xontrib plugins # adapted from https://github.com/NixOS/nixpkgs/issues/75786#issuecomment-873654103 mach-nix = import (builtins.fetchGit { url = "https://github.com/DavHau/mach-nix/"; ref = "refs/tags/3.4.0"; }) { pkgs = final; }; xonsh_pyenv = final.mach-nix.mkPython { requirements = '' xontrib-fzf-widgets xonsh-direnv ''; }; xonsh_with_plugins = final.xonsh.overrideAttrs (old: { propagatedBuildInputs = old.propagatedBuildInputs ++ final.xonsh_pyenv.python.pkgs.selectPkgs final.xonsh_pyenv.python.pkgs; }); }