Serve minified stylesheet when SCRIPT_DEBUG or WP_DEBUG is defined

function.php

<?php

/*
 * Manage loading of theme styles
 */
add_action( 'after_setup_theme', 'child_load_stylesheet' );
function child_load_stylesheet() {
	
	// First, remove the stylesheet
	remove_action( 'genesis_meta', 'genesis_load_stylesheet' );
	
	// Enqueue the new stylesheet at a later priority to trump WooCommerce
	add_action( 'wp_enqueue_scripts', 'child_enqueue_main_stylesheet', 15 );	
}

function child_enqueue_main_stylesheet() {

	$stylesheet = get_stylesheet_directory() . '/style.css';
	$cachebust = ( file_exists($stylesheet) ? filemtime($stylesheet) : mt_rand() );
	$version = defined( 'CHILD_THEME_VERSION' ) && CHILD_THEME_VERSION ? CHILD_THEME_VERSION : PARENT_THEME_VERSION;
	$handle  = defined( 'CHILD_THEME_NAME' ) && CHILD_THEME_NAME ? sanitize_title_with_dashes( CHILD_THEME_NAME ) : 'child-theme';

	// Serve minified stylesheet when SCRIPT_DEBUG or WP_DEBUG is false
	if ( SCRIPT_DEBUG == true || WP_DEBUG == true ) {		
		wp_enqueue_style( $handle, get_stylesheet_directory_uri() . '/style.css', false, $cachebust ); 
	}
	else {	
		wp_enqueue_style( $handle, get_stylesheet_directory_uri() . '/style.min.css', false, $version ); 
	}
	
}