diff -pruN 4.21-5/debian/changelog 4.21-5ubuntu3/debian/changelog
--- 4.21-5/debian/changelog	2020-03-28 18:02:52.000000000 +0000
+++ 4.21-5ubuntu3/debian/changelog	2020-11-11 22:22:09.000000000 +0000
@@ -1,3 +1,24 @@
+pollen (4.21-5ubuntu3) hirsute; urgency=medium
+
+  * No-change rebuild using new golang
+
+ -- Steve Langasek <steve.langasek@ubuntu.com>  Wed, 11 Nov 2020 22:22:09 +0000
+
+pollen (4.21-5ubuntu2) groovy; urgency=medium
+
+  * No-change rebuild using new golang
+
+ -- Steve Langasek <steve.langasek@ubuntu.com>  Tue, 22 Sep 2020 08:53:45 +0000
+
+pollen (4.21-5ubuntu1) focal; urgency=low
+
+  * Merge from Debian unstable.  Remaining changes:
+    - d/control: add breaks/replaces on pollinate 4.33-1 which is when the
+      check_pollen script was added to pollinate. Case #9 of package transition.
+      [Can be dropped after 20.04]
+
+ -- Gianfranco Costamagna <locutusofborg@debian.org>  Mon, 30 Mar 2020 09:26:30 +0200
+
 pollen (4.21-5) unstable; urgency=medium
 
   * debian/control: use dh12
@@ -7,12 +28,30 @@ pollen (4.21-5) unstable; urgency=medium
 
  -- Thorsten Alteholz <debian@alteholz.de>  Sat, 28 Mar 2020 19:02:52 +0100
 
+pollen (4.21-4ubuntu2) eoan; urgency=low
+
+  * Merge from Debian unstable.  Remaining changes:
+    - d/control: add breaks/replaces on pollinate 4.33-1 which is when the
+      check_pollen script was added to pollinate. Case #9 of package transition.
+      [Can be dropped after 20.04]
+    - export a real HOME directory, to avoid a build failure
+
+ -- Gianfranco Costamagna <locutusofborg@debian.org>  Wed, 21 Aug 2019 09:16:06 +0200
+
 pollen (4.21-4) unstable; urgency=medium
 
   * upload source package
 
  -- Thorsten Alteholz <debian@alteholz.de>  Mon, 19 Aug 2019 22:02:52 +0000
 
+pollen (4.21-3ubuntu1) eoan; urgency=medium
+
+  * d/control: add breaks/replaces on pollinate 4.33-1 which is when the
+    check_pollen script was added to pollinate. Case #9 of package transition.
+    [Can be dropped after 20.04]
+
+ -- Andreas Hasenack <andreas@canonical.com>  Tue, 21 May 2019 10:49:37 -0300
+
 pollen (4.21-3) unstable; urgency=medium
 
   * debian/control: add salsa VCS URLs
diff -pruN 4.21-5/debian/control 4.21-5ubuntu3/debian/control
--- 4.21-5/debian/control	2020-03-28 18:02:52.000000000 +0000
+++ 4.21-5ubuntu3/debian/control	2020-09-22 08:53:45.000000000 +0000
@@ -1,7 +1,8 @@
 Source: pollen
 Section: admin
 Priority: optional
-Maintainer: Thorsten Alteholz <debian@alteholz.de>
+Maintainer: Ubuntu Developers <ubuntu-devel-discuss@lists.ubuntu.com>
+XSBC-Original-Maintainer: Thorsten Alteholz <debian@alteholz.de>
 Build-Depends: debhelper-compat (= 12)
 	, dh-apparmor
 	, dh-golang
@@ -24,6 +25,7 @@ Depends: ${misc:Depends}, ${shlibs:Depen
 Recommends: pollinate
 	, rng-tools
 Suggests: apparmor (>= 2.3)
+Breaks: pollinate (<< 4.33-1)
 Description: Entropy-as-a-Service web server
  Pollen is an Entropy-as-a-Service web server, providing random seeds.
  This can be performed over both cleartext http and encrypted