def __virtual__():
    """
    Confirm this module is on a Debian-based system
    """
    # If your minion is running an OS which is Debian-based but does not have
    # an "os_family" grain of Debian, then the proper fix is NOT to check for
    # the minion's "os_family" grain here in the __virtual__. The correct fix
    # is to add the value from the minion's "os" grain to the _OS_FAMILY_MAP
    # dict in salt/grains/core.py, so that we assign the correct "os_family"
    # grain to the minion.
    if __grains__.get("os_family") == "Debian":
        return __virtualname__
    return False, "The pkg module could not be loaded: unsupported OS family"