Rebuild

Also explicitly set ``include_system_packages`` to False.

While that setting is now the a default we consume from
``layer-basic`` it is more clear for the causual reader
of the charm source code.

Change-Id: I761ac74be1e254dda7dec3b14869feb5f12573fe

rebuild

@@ -2,4 +2,4 @@
 # when dependencies of the charm change,
 # but nothing in the charm needs to.
 # simply change the uuid to something new
-d5e1ff5b-5739-4bd2-95d5-c3480265c6ba
+f57f307b-74f9-4f1d-bdc2-50e20aecbb63

src/layer.yaml

@@ -11,6 +11,8 @@ includes:
  - interface:tls-certificates
 options:
   basic:
+    use_venv: True
+    include_system_packages: False
     packages:
       - libffi-dev
       - libpq-dev