diff --git a/guix/profiles.scm b/guix/profiles.scm
index e8bd564efa..154c8a105f 100644
--- a/guix/profiles.scm
+++ b/guix/profiles.scm
@@ -658,7 +658,8 @@ (define build
 
             ;; Union all the icons.
             (mkdir-p (string-append #$output "/share"))
-            (union-build destdir icondirs)
+            (union-build destdir icondirs
+                         #:log-port (%make-void-port "w"))
 
             ;; Update the 'icon-theme.cache' file for each icon theme.
             (for-each