Is it possible to install latest version of RaySession on Ubuntu MATE 20.04 LTS?

The lrelease executable is contained in two development packages. We have already installed one of them – qtchooser, so we also need to install the second one – qttools5-dev-tools which provides /usr/lib/qt5/bin/lrelease file:

sudo apt-get install qttools5-dev-tools

and then resume compilation by

cd ~/Downloads/RaySession
make
sudo make install

Then we need to install two additional packages to resolve runtime dependencies:

sudo apt-get install liblo7 python3-liblo wmctrl

and finally enjoy the RaySession application.