{% set screen = salt['grains.filter_by']({
	'Debian': {
		'package': 'screen',
		'screenrc_file': '/etc/screenrc',
	},
	'Ubuntu': {
		'package': 'screen',
		'screenrc_file': '/etc/screenrc',
	}
}, grain='os', merge=salt['pillar.get']('screen:lookup')) %}