###### group_vars/all/packages.yml
---
packages:
  all:
    - htop
    - less
    - tcptrack

###### group_vars/team1/packages.yml
---
packages:
  team1:
    - screen


###### playbook
- name: install base packages
  apt: >
    pkg={{ item }}
    state=latest
    update_cache=yes
    cache_valid_time=3600
    force=yes
  with_????:
    packages