[Neos] Specific CSS and JS in Backend-View

[Maxi milian]

I want to insert specific CSS- and JS-Files in Backend-View. I found an example in "TYPO3.NeosDemoTypo3Org" Package.

<f:if condition="{node.context.workspace.name} != 'live'">
  <link rel="stylesheet" href="{f:uri.resource(path: 'Styles/Backend.css', package: 'TYPO3.NeosDemoTypo3Org')}" media="all" />
</f:if>

But in my package this Code-Snippet is still not working. How could i fix this?