You'll need the following dependencies:
libglib2.0-dev
libgtop2-dev
libgranite-dev
libgtk-3-dev
libwingpanel-2.0-dev
meson
valac
sudo apt install libgtop2-dev libgranite-dev libgtk-3-dev libwingpanel-2.0-dev meson valac
Run meson to configure the build environment and then ninja to build
meson build --prefix=/usr
cd build
ninja
To install, use ninja install
sudo ninja install