you can ask Alire to install the latest GNAT it built, or to use another version installed on your machine, see https://alire.ada.dev/transition_from_gnat_community.html
It also explains how to install GNATprove: ``alr with gnatprove``
It also explains how to install GNATprove: ``alr with gnatprove``
cd ~/.emacs.d/elpa/ada-mode-i.j.k
./build.sh
./install.sh
Actually I didn't get that working with any of the options I tried I guess.