diff -Nru ginac-1.8.0/debian/changelog ginac-1.8.0/debian/changelog
--- ginac-1.8.0/debian/changelog	2020-10-15 18:10:49.000000000 +0000
+++ ginac-1.8.0/debian/changelog	2020-11-09 22:47:12.000000000 +0000
@@ -1,3 +1,12 @@
+ginac (1.8.0-2) unstable; urgency=medium
+
+  * Non-maintainer upload.
+
+  [ Helmut Grohne ]
+  * Fix FTCBFS: Annotate python3 build dependency with :any. (Closes: #974105)
+
+ -- Richard B. Kreckel <kreckel@debian.org>  Mon, 09 Nov 2020 23:47:12 +0100
+
 ginac (1.8.0-1) unstable; urgency=low
 
   * New upstream release: binary incompatible, so it's libginac11 now.
diff -Nru ginac-1.8.0/debian/control ginac-1.8.0/debian/control
--- ginac-1.8.0/debian/control	2020-10-15 18:09:06.000000000 +0000
+++ ginac-1.8.0/debian/control	2020-11-09 22:47:12.000000000 +0000
@@ -2,7 +2,7 @@
 Section: math
 Priority: optional
 Maintainer: Richard Kreckel <kreckel@ginac.de>
-Build-Depends: cdbs (>= 0.4.28), debhelper (>= 9), libcln-dev, libgmp-dev, libreadline-dev, pkg-config (>= 0.18) | pkgconf, python3, texinfo
+Build-Depends: cdbs (>= 0.4.28), debhelper (>= 9), libcln-dev, libgmp-dev, libreadline-dev, pkg-config (>= 0.18) | pkgconf, python3:any, texinfo
 Standards-Version: 4.5.0
 Homepage: http://www.ginac.de/