Configuring ox-context

[juh]

Dear all,

this configuration does not work.

#+begin_src emacs-lisp
    (use-package ox-context
      :straight (ox-context :type git :host github :repo 
"Jason-S-Ross/ox-context")
    :config
    (add-to-list 'org-context-presets-alist
     '("book" .
       (:literal "\n\\environment juh.env-garamond
  \n\\environment juh.env-garamond-trimsize5-8
  \n\\environment juh.env-makeups
  \n\\environment juh.env-umbruch
  \n\\environment juh.env-heading
  \n\\environment juh.env-layout
  \n\\environment juh.env-header-footer
  \n\\environment juh.env-ligaturen"
        :template "report"
        :snippets ("title-article")))))
#+end_src

test.org:

#+title: Test
#+context_preset: book
#+context_snippet: title-snippet

I get an export but the styles are not applied.

Any hints?
juh