Just thought posting the whole code for my child theme is more helpful.
derived from parent-style = twentyfifteen-style, and my child theme is child-style = zlabiya-style
/* load the styles and overrides */
function zlabiya_enqueue_styles() {
wp_enqueue_style( 'twentyfifteen-style', get_template_directory_uri() . '/style.css' );
wp_enqueue_style( 'zlabiya-style',
get_stylesheet_directory_uri() . '/style.css',
array('twentyfifteen-style')
);
}
add_action( 'wp_enqueue_scripts', 'zlabiya_enqueue_styles' );
The problem here is really that the codex entry need a proper clean up. The examples there are really generic, while the text refers to twentyfifteen. You are supposed to replace textually 'parent-style' and 'child-style' by their proper name for it to work.
If I derive a child theme from twentyfifteen, the code is
wp_enqueue_style( 'twentyfifteen-style', get_template_directory_uri().'/style.css' ); and NOT
wp_enqueue_style( 'parent-style', get_template_directory_uri().'/style.css' );
This is, imho, the proper and intended way of using scripts and styles enqueuing.
Using wp_deregister_style, while it works, is overkill.
