WordPress - Query Custom Post Type and taxonomy term by ID

gistfile1.aw

<?php

// gets the ID from a custom field to show posts on a specific page
$buildType = get_post_meta($post->ID, 'build_type_id', true);
// run query
query_posts(array( 
	'post_type' => 'portfolio',
	'showposts' => -1,
	'tax_query' => array(
	    array(
            'taxonomy' => 'build-type',
            'terms' => $buildType,
            'field' => 'term_id',
	    )
	),
	'orderby' => 'title',
	'order' => 'ASC' )
);

?>