It is still work in progress but some stuff works (if not yet so pretty).
sudo apt-get install valac gcc meson libappstream-dev libjson-glib-dev libswitchboard-2.0-devDownload .deb file and install it via
sudo apt install ./FILENAME.debOpen a Terminal in the extracted folder, build your application with meson and install it with ninja:
meson build --prefix=/usr cd build ninja sudo ninja installOpen a terminal in the build folder.
sudo ninja uninstall