How can I get diodon.h on arch?

[Squirreljetpack]

Waf: Entering directory `/home/arch/built/diodon-plugins/_build_'
[ 9/23] c: _build_/plugins/dbus-controller/dbus-controller.c -> _build_/plugins/dbus-controller/dbus-controller.c.1.o
In file included from plugins/dbus-controller/dbus-controller.c:22:
plugins/dbus-controller/dbus-controller.h:9:10: fatal error: diodon.h: No such file or directory
    9 | #include <diodon.h>
      |          ^~~~~~~~~~
compilation terminated.
Waf: Leaving directory `/home/arch/built/diodon-plugins/_build_'
Build failed
 -> task in 'dbus-controller' failed (exit status 1):
	{task 140031454868432: c dbus-controller.c -> dbus-controller.c.1.o}
['/usr/bin/gcc', '-O0', '-g3', '-w', '-fPIC', '-fPIC', '-pthread', '-pthread', '-pthread', '-pthread', '-pthread', '-I/home/arch/built/diodon-plugins', '-I/home/arch/built/diodon-plugins/_build_', '-I/usr/include/gtk-3.0', '-I/usr/include/pango-1.0', '-I/usr/include/glib-2.0', '-I/usr/lib/glib-2.0/include', '-I/usr/include/harfbuzz', '-I/usr/include/freetype2', '-I/usr/include/libpng16', '-I/usr/include/libmount', '-I/usr/include/blkid', '-I/usr/include/fribidi', '-I/usr/include/cairo', '-I/usr/include/lzo', '-I/usr/include/pixman-1', '-I/usr/include/gdk-pixbuf-2.0', '-I/usr/include/gio-unix-2.0', '-I/usr/include/cloudproviders', '-I/usr/include/atk-1.0', '-I/usr/include/at-spi2-atk/2.0', '-I/usr/include/dbus-1.0', '-I/usr/lib/dbus-1.0/include', '-I/usr/include/at-spi-2.0', '-I/usr/include/libpeas-1.0', '-I/usr/include/gobject-introspection-1.0', '-DHAVE_DIODON=1', '-DHAVE_PEAS=1', '-DHAVE_PEASGTK=1', 'plugins/dbus-controller/dbus-controller.c', '-c', '-o', 'plugins/dbus-controller/dbus-controller.c.1.o']

I assume I need to install diodon-dev? But the package isn't available on arch.