gistfile1.yml

# /srv/salt/zabbix/agent.sls

zabbix.agent:
  pkg.installed:
    - pkgs:
      - zabbix-agent

  service.running:
    - name: zabbix-agent
    - enable: True
    - reload: True
    - watch:
      - pkg: zabbix-agent
      - file: /etc/zabbix/zabbix_agentd.conf

/etc/zabbix/zabbix_agentd.conf:
  file.managed:
    - source: salt://zabbix/files/zabbix_agentd.conf

gistfile2.yml

# /srv/salt/zabbix/init.sls

include:
  - repos.dotdeb

gistfile3.sh

$ sudo salt '*' state.highstate
----------
          ID: zabbix.agent
    Function: service.running
        Name: zabbix_agentd
      Result: False
     Comment: The following requisites were not found:
                                 watch:
                                     pkg: zabbix-agent


$ sudo service zabbix-agent status
[ ok ] zabbix_agentd is running.