Running Ansible on NixOS (hopefully simple2anwser newbie qeustion)

[felixx9]

I do prepare and test the workhorse switch from Manjaro to NixOS.
What I cam across and could not solve so far is this missing module error:

ModuleNotFoundError: No module named 'passlib'

Failed to import the required Python library (passlib) on niksos's Python /nix/store/rac8pxbi1vapwrlqzbrkycbyg521djzw-python3-3.11.6/bin/python3.11.

I did add following to my configuration.nix:

environment.systemPackages = with pkgs; [
    ansible
    just
    python311Full
    python311Packages.passlib
  ];

The mentioned path (in error message) exists. But still - the very same error.

I found the flake.nix file, in which the module is mentioned but am completely new to NixOS - so no idea about how to use flakes, so far.

Can anybody point me in the right direction (what to do with this file to be able to run the playbook successfully), please!?

Thx a lot - since it's quite a steep learning curve...

Related: e323ab3, @Naalunth

[felixx9]

obviously wrong place. Sorry.