fix local path prefix setting

tasks/facts.yml

@@ -1,9 +1,18 @@
 # vim: set filetype=yaml.ansible :
 ---
-- name: Set path prefix
+- name: Set local path prefix
+  when:
+    - use_local
   ansible.builtin.set_fact:
     path:
-      prefix: "{{ path.prefix | default(defaults.path.prefix) }}"
+      prefix: "{{ lookup('ansible.builtin.env', 'HOME') ~ '/.local' }}"
+
+- name: Set non-local path prefix
+  when:
+    - not use_local
+  ansible.builtin.set_fact:
+    path:
+      prefix: "{{ defaults.path.prefix }}"
 
 - name: Set install variables
   ansible.builtin.set_fact: