fixing variable usage and deploying to headless machine

roles/base/tasks/main.yml

@@ -25,3 +25,12 @@
     - tree
     - unzip
     - zsh
+
+- name: set up tools specifically for headless systems
+  when: headless
+  become: true
+  ansible.builtin.apt: name={{ item }} state=present
+  with_items:
+    - emacs-nox
+    - vim-nox
+