diff --git a/nongnu/packages/messaging.scm b/nongnu/packages/messaging.scm
index 4f47343e..3ad872c0 100644
--- a/nongnu/packages/messaging.scm
+++ b/nongnu/packages/messaging.scm
@@ -234,7 +234,8 @@ or iOS.")
                      `("PATH" prefix
                        ,(list #$@(map (lambda (pkg)
                                         (file-append (this-package-input pkg) "/bin"))
-                                      '("pulseaudio"))))
+                                      '("mesa-utils"
+                                        "pulseaudio"))))
                      `("LD_LIBRARY_PATH" prefix
                        ,(list (string-append #$(this-package-input "nss") "/lib/nss")
                               (string-append #$output "/lib/")
@@ -405,6 +406,8 @@ or iOS.")
                   libxrender
                   libxshmfence
                   mesa
+                  ;; Needed for screensharing.
+                  mesa-utils
                   mit-krb5
                   nspr
                   nss