anchor.diff:                        :buffer (make-internal-buffer :title "*OS packages*")))))
       (html-set
        (markup:markup
  -            (:style (style buffer))
  -            (:h1 "Package files")
  -            (:ul
  -             (loop for package-or-output in packages-or-outputs
  -                   collect (markup:markup*
  -                            `(:li ,(object-string package-or-output)
  -                                  (:ul
  -                                   ,@(mapcar (lambda (file)
  -                                               `(:li ,(if (viewable-file-type-p file)
  -                                                          `(:a :href ,file ,file)
  -                                                          file)))
  -                                             (ospama:list-files (list package-or-output)))))))))
  +      (:style (style buffer))
  +      (:h1 "Package files")
  +      (:ul
  +       (loop for package-or-output in packages-or-outputs
  +             collect (markup:markup*
  +                      `(:li ,(object-string package-or-output)
  +                            (:ul
  +                             ,@(mapcar (lambda (file)
  +                                         `(:li ,(if (viewable-file-type-p file)
  +                                                    `(:a :href ,file ,file)
  +                                                    file)))
  +                                       (ospama:list-files (list package-or-output)))))))))
        buffer)
       (set-current-buffer buffer)
       buffer))
  
positive.code: ;; TODO: open in editor, with select program, leverage file-manager
  (define-command list-os-package-files ()
    "List files of select packages."
    (let* ((packages-or-outputs (if (typep (ospama:manager) 'ospama:guix-manager)
                                    (prompt-minibuffer
                                     :suggestion-function (os-package-output-suggestion-filter)
  
negative.code: 
  (define-command install-os-package ()
    "Install select packages."
    (assert-package-manager)
    ;; TODO: Allow profile creation.  Need multi-source support for that?
    (let* ((profile (prompt-minibuffer
                     :suggestion-function (os-profile-suggestion-filter)
  