bug#29076: [PATCH core-updates] build-system/glib-or-gtk: Don't generate 'icon-theme.cache'.

[Danny Milosavljevic]

* guix/build-system/glib-or-gtk.scm (glib-or-gtk-build): Don't generate
'icon-theme.cache'.
---
 guix/build-system/glib-or-gtk.scm | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/guix/build-system/glib-or-gtk.scm 
b/guix/build-system/glib-or-gtk.scm
index d585d84f2..fb241ec94 100644
--- a/guix/build-system/glib-or-gtk.scm
+++ b/guix/build-system/glib-or-gtk.scm
@@ -159,7 +159,9 @@
                           #:glib-or-gtk-wrap-excluded-outputs
                            ,glib-or-gtk-wrap-excluded-outputs
                           #:configure-flags ,configure-flags
-                          #:make-flags ,make-flags
+                          ;; Disable icon theme cache generation.
+                          #:make-flags ,(cons "gtk_update_icon_cache=true"
+                                              make-flags)
                           #:out-of-source? ,out-of-source?
                           #:tests? ,tests?
                           #:test-target ,test-target