You'll need the following dependencies:
libcanberra-gtk-dev
libgranite-dev
libglib2.0-dev
libgtk-3-dev
libnotify-dev
libpulse-dev
libwingpanel-2.0-dev >= 2.1.0
meson
valac (>= 0.26)
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