> I had thought js-mathjax was just the component files too and not > truely built from source. Maybe I was wrong. Currently, building this > from the true source requires a huge number of js packages and we > haven't got a npm importer and full JavaScript bootstrap yet so I > wasn't sure what to do. True. js-mathjax is not truly built from source. A true source build will properly depend on a huge number of other js packaces. js-mathjax only redoes the minification step. In light of this, perhaps we should remove js-mathjax from Guix. But, I'm not sure. > If you like we can ignore this and I can modify calibre to disable > mathjax for now since I don't think it works with the old mathjax 2. I > would like to work on getting more JavaScript in to guix properly Yes, disabling mathjax for calibre is a good way to go if the functionality is not too critical. But, I don't know much about calibre. So, someone else should take a call.