Install vala-mode-el by entering the following commands in the terminal:
sudo apt update sudo apt install vala-mode-el
Description:
Transition Package, vala-mode-el to elpa-vala-mode
Vala mode has been elpafied. Ease transition from vala-mode-el to elpa-vala-mode with this dummy package.
Homepage: https://wiki.gnome.org/Projects/Vala/Emacs
Version: 0.1-4
Section: universe/editors