diff -Nru calibre-4.99.4+dfsg+really4.12.0/debian/changelog calibre-4.99.4+dfsg+really4.12.0/debian/changelog
--- calibre-4.99.4+dfsg+really4.12.0/debian/changelog	2020-03-06 12:09:07.000000000 +0000
+++ calibre-4.99.4+dfsg+really4.12.0/debian/changelog	2020-04-10 18:56:10.000000000 +0000
@@ -1,3 +1,9 @@
+calibre (4.99.4+dfsg+really4.12.0-1build1) focal; urgency=medium
+
+  * No-change rebuild against qtbase-abi-5-12-8.
+
+ -- Rik Mills <rikmills@kde.org>  Fri, 10 Apr 2020 19:56:10 +0100
+
 calibre (4.99.4+dfsg+really4.12.0-1) unstable; urgency=medium
 
   [ YOKOTA Hiroshi ]