diff -pruN 2021.2-1/debian/changelog 2021.2-1ubuntu1/debian/changelog
--- 2021.2-1/debian/changelog	2021-10-10 16:32:30.000000000 +0000
+++ 2021.2-1ubuntu1/debian/changelog	2022-01-06 07:02:30.000000000 +0000
@@ -1,3 +1,15 @@
+votca-xtp (2021.2-1ubuntu1) jammy; urgency=medium
+
+  * Set --max-parallel=2 to avoid OOM on amd64, arm64 and ppc64el
+
+ -- Graham Inggs <ginggs@ubuntu.com>  Thu, 06 Jan 2022 07:02:30 +0000
+
+votca-xtp (2021.2-1build1) jammy; urgency=medium
+
+  * No-change rebuild against libxc9
+
+ -- Graham Inggs <ginggs@ubuntu.com>  Tue, 04 Jan 2022 11:45:17 +0000
+
 votca-xtp (2021.2-1) unstable; urgency=medium
 
   * New upstream release.
diff -pruN 2021.2-1/debian/control 2021.2-1ubuntu1/debian/control
--- 2021.2-1/debian/control	2021-10-10 15:42:45.000000000 +0000
+++ 2021.2-1ubuntu1/debian/control	2022-01-05 08:12:02.000000000 +0000
@@ -1,7 +1,8 @@
 Source: votca-xtp
 Section: science
 Priority: optional
-Maintainer: Debichem Team <debichem-devel@lists.alioth.debian.org>
+Maintainer: Ubuntu Developers <ubuntu-devel-discuss@lists.ubuntu.com>
+XSBC-Original-Maintainer: Debichem Team <debichem-devel@lists.alioth.debian.org>
 Uploaders: Nicholas Breen <nbreen@debian.org>
 Build-Depends: cmake,
                debhelper-compat (= 13),
diff -pruN 2021.2-1/debian/rules 2021.2-1ubuntu1/debian/rules
--- 2021.2-1/debian/rules	2021-10-10 16:32:30.000000000 +0000
+++ 2021.2-1ubuntu1/debian/rules	2022-01-05 08:10:25.000000000 +0000
@@ -31,4 +31,4 @@ override_dh_installman:
 	dh_installman --sourcedir=$(CURDIR)/debian/man
 
 %:
-	dh $@ --with python3
+	dh $@ --max-parallel=2 --with python3