I use an older version of the example42 mysql module, which defines the mysql.conf file but not its content. Mmy goal is to just include the mysql module and add a content definition in the node.

class mysql {
    ...
    file { "mysql.conf":
        path => "${mysql::params::configfile}",
        mode => "${mysql::params::configfile_mode}",
        owner => "${mysql::params::configfile_owner}",
        group => "${mysql::params::configfile_group}",
        ensure => present,
        require => Package["mysql"],
        notify => Service["mysql"],
    }
    ...
}


node xyz
{
    include mysql
    File["mysql.conf"] { content => template("mymodule/mysql.conf.erb")}
}

The above code produces a "Only subclasses can override parameters"

What is the correct way to just add a content definition to an existing file definition?