diff -Nru horizon-14.0.1/debian/changelog horizon-14.0.1/debian/changelog
--- horizon-14.0.1/debian/changelog	2018-11-27 19:17:30.000000000 +0000
+++ horizon-14.0.1/debian/changelog	2019-02-20 17:15:16.000000000 +0000
@@ -1,3 +1,14 @@
+horizon (3:14.0.1-0ubuntu2) cosmic; urgency=medium
+
+  * d/python*-django-horizon.preinst: As of rocky,
+    /usr/share/openstack-dashboard/openstack_dashboard is a symlink created
+    with update-alternatives. Prior to rocky, files were copied to
+    /usr/share/openstack-dashboard/openstack_dashboard. This change ensures
+    the directory is removed if it is not a symlink prior to rocky
+    installation (LP: #1815948).
+
+ -- Corey Bryant <corey.bryant@canonical.com>  Wed, 20 Feb 2019 12:15:16 -0500
+
 horizon (3:14.0.1-0ubuntu1) cosmic; urgency=medium
 
   * d/gbp.conf: Create stable/rocky branch.
diff -Nru horizon-14.0.1/debian/python3-django-horizon.preinst horizon-14.0.1/debian/python3-django-horizon.preinst
--- horizon-14.0.1/debian/python3-django-horizon.preinst	1970-01-01 00:00:00.000000000 +0000
+++ horizon-14.0.1/debian/python3-django-horizon.preinst	2019-02-20 17:15:16.000000000 +0000
@@ -0,0 +1,12 @@
+#!/bin/sh
+
+set -e
+
+openstack_dashboard="/usr/share/openstack-dashboard/openstack_dashboard"
+if [ ! -L "$openstack_dashboard" ] && [ -d "$openstack_dashboard" ]; then
+    rm -rf "$openstack_dashboard" || :
+fi
+
+#DEBHELPER#
+
+exit 0
diff -Nru horizon-14.0.1/debian/python-django-horizon.preinst horizon-14.0.1/debian/python-django-horizon.preinst
--- horizon-14.0.1/debian/python-django-horizon.preinst	1970-01-01 00:00:00.000000000 +0000
+++ horizon-14.0.1/debian/python-django-horizon.preinst	2019-02-20 17:15:16.000000000 +0000
@@ -0,0 +1,12 @@
+#!/bin/sh
+
+set -e
+
+openstack_dashboard="/usr/share/openstack-dashboard/openstack_dashboard"
+if [ ! -L "$openstack_dashboard" ] && [ -d "$openstack_dashboard" ]; then
+    rm -rf "$openstack_dashboard" || :
+fi
+
+#DEBHELPER#
+
+exit 0