diff --git a/profiles/package.mask b/profiles/package.mask
index 14dc015c5a7c9..16add49060f76 100644
--- a/profiles/package.mask
+++ b/profiles/package.mask
@@ -29,6 +29,18 @@
 
 #--- END OF EXAMPLES ---
 
+# Michał Górny <mgorny@gentoo.org> (09 Apr 2019)
+# Obsolete XFCE library with its remaining dependencies.  In all cases,
+# the relevant plugins have been abandoned upstream and the upstream
+# repository is dead or not to be found.  All of them are unlikely
+# to be ported away from libxfcegui4 and/or into GTK+3.
+# Removal in 30 days.  Bug #590306.
+xfce-base/libxfcegui4
+xfce-extra/xfce4-gvfs-mount
+xfce-extra/xfce4-linelight-plugin
+xfce-extra/xfce4-messenger-plugin
+xfce-extra/xfce4-modemlights-plugin
+
 # Michał Górny <mgorny@gentoo.org> (09 Apr 2019)
 # Marked deprecated upstream.  Still uses xfce-base/libxfcegui4.
 # Unlikely to be ported to GTK+3.