nix: Make nix the root

Which means now I'll have to think about real prefixes in commit names.

unprocessed/config/automatrop/roles/extensions/tasks/main.yml

@@ -0,0 +1,14 @@
+---
+- name: Load extensions
+  ansible.builtin.include_role:
+    name: geoffreyfrogeye.{{ extension }}automatrop.entry
+  loop: "{{ extensions }}"
+  loop_control:
+    loop_var: extension
+  tags: always
+
+- name: Configure extensions rc sourcing
+  ansible.builtin.template:
+    src: extrc.sh.j2
+    dest: "{{ ansible_user_dir }}/.config/shell/extrc"
+    mode: u=rw,g=r,o=r

unprocessed/config/automatrop/roles/extensions/templates/extrc.sh.j2

@@ -0,0 +1,7 @@
+#!/usr/bin/env bash
+
+{% for extension in extensions %}
+trysource ~/.config/{{ extension }}scripts/{{ extension }}profile
+{% endfor %}
+{# TODO Rename profile as rc, and add env #}
+{# TODO Put in non-linked path #}