How to make propel build models with namespaces in the right directory?

Default directory for my classes is: app/

Composer autoload config is:

{
    "autoload": {
        "psr-4": { "App\\": "app/" }
    }
}

On propel's schema.xml my namespace is "App\Models"

<database name="default" defaultIdMethod="native"
          xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
          xsi:noNamespaceSchemaLocation="http://xsd.propelorm.org/1.6/database.xsd"
          namespace="App\Models"
        >
    <table name="user">
        <column name="id" type="integer" required="true" primaryKey="true" autoIncrement="true"/>
        <column name="email" type="varchar" size="255" required="true"/>
        <column name="password" type="varchar" size="60" required="true"/>
        <column name="country_id" type="integer" required="true"/>
        <column name="timezone" type="varchar" size="50" required="true"/>
        <foreign-key foreignTable="country">
            <reference local="country_id" foreign="id"/>
        </foreign-key>
    </table>

    <table name="country">
        <column name="id" type="integer" required="true" primaryKey="true" autoIncrement="true"/>
        <column name="name" type="varchar" size="128" required="true"/>
    </table>
</database>

My propel.php.dist is:

<?php
return [
    'propel' => [
        'paths' => [
            // The directory where Propel expects to find your `schema.xml` file.
            'schemaDir' => 'database/schemas',

            // The directory where Propel should output generated object model classes.
            'phpDir' => 'app/Models'
        ]
    ]
];

When I execute vendor/bin/propel model:build the resulting structure is like this:

/app/
|___Models/
    |___App/
        |___Models/
            |___Base/
            |___Map/
            |___Country.php
            |___CountryQuery.php
            |___User.php
            |___UserQuery.php

I need the structure to be like this:

/app/
|___Models/
    |___Base/
    |___Map/
    |___Country.php
    |___CountryQuery.php
    |___User.php
    |___UserQuery.php

I tried every combination in this manual: Database Attributes

Is there a different way to approach this?

Thanks in advance.

The configuration specified in the question looks correct, except for one thing that is missing, which made it work in my case: set namespaceAutoPackage to false. In the case of the question's php configuration file, that looks like this:

<?php
return [
    'propel' => [
        'paths' => [
            // The directory where Propel expects to find your `schema.xml` file.
            'schemaDir' => 'database/schemas',

            // The directory where Propel should output generated object model classes.
            'phpDir' => 'app/Models'
        ],
        'generator' => [
            'namespaceAutoPackage' => 'false'
        ]
    ]
];