(:name gregorio-mode
       :website "https://jsrjenkins.github.io/gregorio-mode/"
       :description "Major derived mode for .gabc (gregorio) files"
       :type github
       :pkgname "jsrjenkins/gregorio-mode"
       :features gregorio-mode
       :prepare (progn
                     (add-to-list 'auto-mode-alist '("\\.gabc$" . gregorio-mode))))