Den lör 26 aug. 2023 kl 18:23 skrev Ihor Radchenko <yantar92@posteo.net>:

> Henrik Frisk <frisk.h@gmail.com> writes:
>
> >> Is lilypond library is loaded when you open Org file?
> >> What happens if you run C-c ' on an src-block?
> >>
> >
> > That works fine, code is syntax highlighted.
>
> Hmm. Did you customize `org-src-fontify-natively'?
>

This is what I have:

(setq org-confirm-babel-evaluate nil
      org-src-fontify-natively t
      org-src-tab-acts-natively t)