Run:
git clone --depth=1 https://github.com/salif/xkc-installer /tmp/xkc-installer
git clone --depth=1 https://github.com/salif/colemak-ru /tmp/colemak-ru
sudo EDITOR="${EDITOR:-nano}" /tmp/xkc-installer/installer.bash /tmp/colemak-ru/linux/xkc.conf
Then add Russian (Colemak)
via your desktop environment’s settings.
If it doesn’t work then create an issue on this repository