Use the standard requirements.txt for prereqs
diff --git a/ansible/roles/common/defaults/main.yml b/ansible/roles/common/defaults/main.yml
index 46f473c..d8351fb 100644
--- a/ansible/roles/common/defaults/main.yml
+++ b/ansible/roles/common/defaults/main.yml
@@ -5,6 +5,9 @@
 use_latest_for:
   - debian-keyring
   - debian-archive-keyring
+  - python-dev
+  - libssl-dev
+  - python-virtualenv
 
 obsolete_services:
   - puppet