Python3Full.withPackages ignoring custom package

I am attempting to install this module and for whatever reason python still can’t seem to find the module.

Here is the expression I’m using for the module:

{ lib, inputs, pkgs, stdenv, ... }:
with pkgs.python3Packages;

buildPythonPackage rec {
  pname = "python-fabric";
  version = "git";
  pyproject = true;

  src = pkgs.fetchFromGitHub {
    owner = "Fabric-Development";
    repo = "fabric";
    rev = "67978f7";
    hash = "sha256-4sLlnR1gFzeDjrxvx76dwcSaM3Q5phL6LgwUP2VLCic=";

  propagatedBuildInputs = with pkgs; [

I am using snowfall-lib, and this package is part of my “united” namespace.

And I install it this way (Simplified from actual config as there’s a bunch of irrelevant side config not part of the issue:

home.packages = with pkgs; [
  (python3Full.withPackages(ps: with ps; [

Yet Nix doesn’t install the package when it’s placed in that withPackages list. If I put united.python-fabric standalone in the list, Nix will install it, but Python won’t see it since it’s not in withPackages.

What am I doing wrong? Why is Nix not setting up my package in withPackages like I expect?

For some reason it now installed. I don’t know what changed.