diff -Nru ovito-2.9.0+dfsg1/debian/changelog ovito-2.9.0+dfsg1/debian/changelog
--- ovito-2.9.0+dfsg1/debian/changelog	2017-08-10 17:44:59.000000000 +0000
+++ ovito-2.9.0+dfsg1/debian/changelog	2017-08-17 05:02:03.000000000 +0000
@@ -1,3 +1,10 @@
+ovito (2.9.0+dfsg1-2ubuntu1) artful; urgency=low
+
+  * Merge from Debian Sid. Remaining changes:
+    - Avoid FTBFS by building with -O2 on ppc64el.
+
+ -- Simon Quigley <tsimonq2@ubuntu.com>  Thu, 17 Aug 2017 00:02:03 -0500
+
 ovito (2.9.0+dfsg1-2) unstable; urgency=medium
 
   * [cdb5bde] Fix FTBFS on archs, where char is unsigned. (Closes: #871248)
@@ -16,6 +23,18 @@
 
  -- Anton Gladky <gladk@debian.org>  Sun, 06 Aug 2017 23:51:38 +0200
 
+ovito (2.8.1+dfsg2-5ubuntu2) artful; urgency=medium
+
+  * No-change rebuild against python3.6
+
+ -- Jeremy Bicha <jbicha@ubuntu.com>  Fri, 28 Jul 2017 23:10:06 -0400
+
+ovito (2.8.1+dfsg2-5ubuntu1) zesty; urgency=medium
+
+  * Avoid FTBFS by building with -O2 on ppc64el
+
+ -- Graham Inggs <ginggs@ubuntu.com>  Thu, 13 Apr 2017 12:01:43 +0200
+
 ovito (2.8.1+dfsg2-5) unstable; urgency=medium
 
   * [eb12b49] Block tests on mips nd mips64el.
diff -Nru ovito-2.9.0+dfsg1/debian/control ovito-2.9.0+dfsg1/debian/control
--- ovito-2.9.0+dfsg1/debian/control	2017-08-06 21:51:10.000000000 +0000
+++ ovito-2.9.0+dfsg1/debian/control	2017-08-17 05:02:03.000000000 +0000
@@ -1,5 +1,6 @@
 Source: ovito
-Maintainer: Debian Science Maintainers <debian-science-maintainers@lists.alioth.debian.org>
+Maintainer: Ubuntu Developers <ubuntu-devel-discuss@lists.ubuntu.com>
+XSBC-Original-Maintainer: Debian Science Maintainers <debian-science-maintainers@lists.alioth.debian.org>
 Uploaders: Anton Gladky <gladk@debian.org>
 Section: science
 Testsuite: autopkgtest
diff -Nru ovito-2.9.0+dfsg1/debian/rules ovito-2.9.0+dfsg1/debian/rules
--- ovito-2.9.0+dfsg1/debian/rules	2017-08-06 21:51:10.000000000 +0000
+++ ovito-2.9.0+dfsg1/debian/rules	2017-08-17 05:02:03.000000000 +0000
@@ -1,5 +1,12 @@
 #!/usr/bin/make -f
 
+DEB_HOST_ARCH := $(shell dpkg-architecture -qDEB_HOST_ARCH)
+
+ifeq ($(DEB_HOST_ARCH), ppc64el)
+export DEB_CXXFLAGS_MAINT_STRIP = -O3
+export DEB_CXXFLAGS_MAINT_APPEND = -O2
+endif
+
 export QT_SELECT=qt5
 %:
 	dh $@ --parallel