this post was submitted on 19 Oct 2024
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If you can install nix (you can install it per user) then you can have whatever you want in a temporary shell with nix-shell -p python
nix profile install nixpkgs#python if you want it actually installed
Home manager is also entirely user level I believe and lets you use a declarative config too
I tried to get install instructions for home-manager and they only had them if you are already on nix?
I didnt get it
Careful, there's three different terms in the mix here:
NixOS: an entire operating system, you don't need this.
nix: the nix package manager. This is what you'll need to install. look for single user install in the instructions.
home-manager: a module for nix. It's aim is to allow declarative configuration of a users' home configuration (and allow easier per-user install of packages on a global nix install).
If you want to go down the nix route, which I would recommend if you enjoy tinkering and having fine control over your system, you should start with installing nix. With that, you can already setup a shell that has the newest version of python available.
Going beyond that, I can link you some more resources, if you want c:
So "nix install" means placing a nix binary somewhere in my user $PATH?
https://programming.dev/comment/8114883
Home-manager > nix profile
Also, nix-shell is supposed to be used for debugging, and nix shell/develop for using packages without installing them
Does home manager work standalone without having nix first? I've never installed it on non-nixos
Nix shell is absolutely for running packages without installing them it literally tells you to do that in the terminal hint
Nix run iirc only works with flakes
No, it builds on top of nix. But it seems like the only real option for declarative package management.
Nix shell and nix-shell are different commands
https://discourse.nixos.org/t/nix-shell-nix-shell-and-nix-develop/25964/4
So does nix shell
nix shell -p works without flakes enabled
Sorry I meant nix-shell -p, I didn't read your original comment properly apparently
It's definitely an option as op wants to run one script from the sounds of it, nix-shell not nix shell is perfect for that
It's a bit needlessly confusing that there are two entirely separate commands with the same name and thought you were talking about the original one
Source on the second statement? My understanding was that nix-shell is legacy for systems without flakes and nix-command enabled, and are being replaced by nix shell/run/develop
https://discourse.nixos.org/t/nix-shell-nix-shell-and-nix-develop/25964/4
Interesting, didn't know the history of the command. But that post confirms my understanding, that nix shell/develop are the new replacements for nix-shell, with nix shell for temporary package installs and nix develop for debugging and developing
As far as I understand, they're not replacements in the same way nix profile replaces nix-env. They seem to serve a different purpose, but I don't know enough to say for certain.
of course they're not a drop-in replacement, as the cli is getting a major redesign, but as per your source
it seems like they are made to fulfill the same purpose