PEAR packages via composer

composer.json

{
    "require": {
        "pear-pear/pear": "1.9.5",
        "pear-pear/Mail_Mime": "1.8.9"
    },
    "repositories": [
        {
            "type": "pear",
            "url": "http://pear.php.net"
        }
    ]
}

if-you-get-trouble.json

{
    "require": {
        "pear-pear.php.net/pear": "1.9.5",
        "pear-pear.php.net/Mail_Mime": "1.8.9"
    },
    "repositories": [
        {
            "type": "pear",
            "url": "http://pear.php.net"
        }
    ]
}