diff --git a/nongnu/packages/steam-client.scm b/nongnu/packages/steam-client.scm
index b25a751..e7592cf 100644
--- a/nongnu/packages/steam-client.scm
+++ b/nongnu/packages/steam-client.scm
@@ -32,6 +32,7 @@
   #:use-module (gnu packages glib)
   #:use-module (gnu packages gnome)
   #:use-module (gnu packages graphics)
+  #:use-module (gnu packages gtk)
   #:use-module (gnu packages libbsd)
   #:use-module (gnu packages libusb)
   #:use-module (gnu packages linux)
@@ -139,6 +140,7 @@
     ("find" ,findutils)                 ; Required at least for some logging.
     ("freetype" ,freetype)              ; Required for steam login.
     ("gawk" ,gawk)
+    ("gdk-pixbuf" ,gdk-pixbuf)          ; Required for steam tray icon.
     ("gcc:lib" ,gcc "lib")              ; Required for steam startup.
     ("grep" ,grep)
     ("libbsd" ,libbsd)
diff --git a/nonguix/multiarch-container.scm b/nonguix/multiarch-container.scm
index 995aa2a..1a61346 100644
--- a/nonguix/multiarch-container.scm
+++ b/nonguix/multiarch-container.scm
@@ -479,6 +479,7 @@ application."
                 ((,union64 "lib") . "/run/current-system/profile/lib64")
                 ((,union64 "lib/locale") . "/run/current-system/locale")
                 ((,union64 "sbin/ldconfig") . "/sbin/ldconfig")
+                ((,union64 "share/mime") . "/usr/share/mime") ; Steam tray icon.
                 ((,union64 "share/drirc.d") . "/usr/share/drirc.d")
                 ((,union64 "share/fonts") . "/run/current-system/profile/share/fonts")
                 ((,union64 "etc/fonts") . "/etc/fonts")