diff -Nru cylc-8.0~a1/debian/changelog cylc-8.0~a1/debian/changelog
--- cylc-8.0~a1/debian/changelog	2020-06-28 18:35:22.000000000 +0000
+++ cylc-8.0~a1/debian/changelog	2020-10-06 14:38:46.000000000 +0000
@@ -1,3 +1,9 @@
+cylc (8.0~a1-5build1) groovy; urgency=medium
+
+  * No-change rebuild to build with python3.9 as supported.
+
+ -- Matthias Klose <doko@ubuntu.com>  Tue, 06 Oct 2020 16:38:46 +0200
+
 cylc (8.0~a1-5) unstable; urgency=medium
 
   * Change dep from fonts-gewlyld to fonts-font-awesome. Closes: #962879