flake-utils-plus VS poetry2nix

You don't need channels to use nix-shell or nix-env. You can generate the Nix path and registry from your flake inputs. flake-utils-plus makes this easy with nix.generateRegistryFromInputs and nix.generateNixPathFromInputs.

Use flake-utils-plus to easily define multiple systems in flake.nix.and then use the --target-host flag of nixos-rebuild to deploy it remotely.

If you're trying to handle multiple systems with one config a flake is a significantly better option. I would personally recommend looking at flake-utils-plus and specifically this example config.

I looked at some past threads / examples and saw people recommend flake-utils-plus, but after reading the examples I don't understand how I would get home-manager on Darwin or Ubuntu.

Depending on your specific needs, the channelsConfig (modify arguments passed to Nixpkgs) and overlay tooling in flake-utils-plus may be adequate: https://github.com/gytis-ivaskevicius/flake-utils-plus/tree/...

For flakes you don't have to set up everything manually there are helper libraries, I use flake-utils-plus.

Converting to flakes is not that hard if you use a good library. The documentation is other people's configs, really.

Neat! I've been using flake-utils-plus's implementation until now. https://github.com/gytis-ivaskevicius/flake-utils-plus/blob/master/lib/repl.nix

I use flake-utils-plus based configuration to apply patches on top of nixpkgs where overlays don't suffice.

How about converting it to Nix derivation?

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

This looks really strange because I do not know how to solve it and also because it looks like the sha256 that I am setting is not the one that Nix will match. I read also https://github.com/nix-community/poetry2nix/issues/413 but I was not able to solve the problem.

There's a project that does this with using Nix: https://github.com/takeda/nix-cde (this is a wrapper around https://github.com/nix-community/poetry2nix)

{ description = "Application packaged using poetry2nix"; inputs.flake-utils.url = "github:numtide/flake-utils"; inputs.nixpkgs.url = "github:NixOS/nixpkgs/nixos-unstable"; inputs.poetry2nix = { url = "github:nix-community/poetry2nix"; inputs.nixpkgs.follows = "nixpkgs"; }; outputs = { self, nixpkgs, flake-utils, poetry2nix }: flake-utils.lib.eachDefaultSystem (system: let # see https://github.com/nix-community/poetry2nix/tree/master#api for more functions and examples. inherit (poetry2nix.legacyPackages.${system}) mkPoetryEnv; pkgs = import nixpkgs {inherit system;}; python = pkgs.python310; pythonEnv = mkPoetryEnv { inherit python; projectDir = ./.; preferWheels = true; }; in { #packages.default = mkPoetryEnv { # projectDir = ./.; # python = pkgs.python310; #}; devShells.default = pkgs.mkShell { buildInputs = [pythonEnv]; packages = [ poetry2nix.packages.${system}.poetry pkgs.cairo pkgs.pkg-config pkgs.gobject-introspection pkgs.tk ]; }; }); }

A cleaner way might be to use https://github.com/nix-community/poetry2nix which can load poetry.lock inside Nix. I still need to try it for torch, but it does seem like a clean way to use it.

The README for poetry2nix (https://github.com/nix-community/poetry2nix) seems to indicate that all extras should be enabled by default.

if it's for a project you're working on, i'd recommend just using poetry2nix

poetry2nix is another popular option.