--- a/build/config/ui.gni	2020-06-25 00:39:28.000000000 +0200
+++ -	2020-08-22 18:01:01.182749726 +0200
@@ -47,8 +47,10 @@
 # Make sure glib is not used if building for ChromeOS/Chromecast
 assert(!use_glib || (is_linux && !is_chromeos && !is_chromecast))
 
-# Whether to use atk, the Accessibility ToolKit library
-use_atk = is_desktop_linux && !is_chromecast && use_glib
+declare_args() {
+  # Whether to use atk, the Accessibility ToolKit library
+  use_atk = is_desktop_linux && !is_chromecast && use_glib
+}
 # =============================================
 #   PLEASE DO NOT ADD MORE FLAGS TO THIS FILE
 # =============================================