anchor.diff:                                                 `(:li ,(if (viewable-file-type-p file)
                                                             `(:a :href ,file ,file)
                                                             file)))
  -                                             (ospama:list-files (list package-or-output))))))))))
  -         (insert-content (ps:ps (setf (ps:@ document body |innerHTML|)
  -                                      (ps:lisp content)))))
  -    (ffi-buffer-evaluate-javascript-async buffer insert-content)
  +                                             (ospama:list-files (list package-or-output)))))))))
  +     buffer)
       (set-current-buffer buffer)
       buffer))
   
  
positive.code:                          :type (or null uiop/launch-program::process-info))))
  
  (define-command cancel-package-operation ()
    (let ((process-info (current-process-info
                         (find-submode (current-buffer) 'os-package-manager-mode))))
      (uiop:terminate-process process-info)
  
negative.code:          (buffer (or (find-buffer 'os-package-manager-mode)
                       (nyxt/os-package-manager-mode:os-package-manager-mode
                        :activate t
                        :buffer (make-internal-buffer :title "*OS packages*")))))
      (html-set
       (markup:markup
              (:style (style buffer))
              (:h1 "Package files")
              (:ul
  