gnu: Add waybar-experimental.

* gnu/packages/wm.scm (waybar-experimental): New variable.

Signed-off-by: Maxim Cournoyer <maxim.cournoyer@gmail.com>
Modified-by: Maxim Cournoyer <maxim.cournoyer@gmail.com>

gnu/packages/wm.scm

@@ -1837,6 +1837,14 @@ core/thread.")
     (home-page "https://github.com/plattfot/cpu-histogram/")
     (license license:expat)))
 
+(define-public waybar-experimental
+  (let ((base waybar))
+    (package/inherit base
+      (name "waybar-experimental")
+      (arguments
+       (list #:configure-flags #~(list "-Dexperimental=true")))
+      (synopsis "Waybar with experimental features"))))
+
 (define-public wlr-randr
   (package
     (name "wlr-randr")