Index.html

<mypackage:link.node node="/sites/mysite/mypage">Click Me!</mypackage:link.node>

NodeViewHelper.php

<?php
namespace My\Package\ViewHelpers\Link;

class NodeViewHelper extends \TYPO3\Neos\ViewHelpers\Link\NodeViewHelper {


	public function render($node = NULL, $format = NULL, $absolute = false, array $arguments, $section = '', $addQueryString = false, array $argumentsToBeExcludedFromQueryString, $baseNodeName = 'documentNode', $nodeVariableName = 'linkedNode', $resolveShortcuts = TRUE) {
		if (is_string($node) && $this->controllerContext->getRequest()->getInternalArgument('__documentNode')) {
			$node = $this->controllerContext->getRequest()->getInternalArgument('__documentNode')->getNode($node);
		}

		return parent::render($node, $format, $absolute, $arguments, $section, $addQueryString, $argumentsToBeExcludedFromQueryString, $baseNodeName, $nodeVariableName, $resolveShortcuts);
	}
}

?>