xfce4-alsa-plugin Simple ALSA volume control for xfce4-panel Installation Dependencies Vala Meson >= 0.37.0 ALSA userspace library (libasound) gettext >= 0.19.7 libxfce4panel-2.0 >= 4.13.0 gtk+-3.0 >= 3.20.0 Building # meson build -Dgtk3=true meson build ninja -C build ninja -C build install