diff -pruN 7.6.0-4/debian/changelog 7.6.0-4ubuntu1/debian/changelog
--- 7.6.0-4/debian/changelog	2021-10-13 12:18:31.000000000 +0000
+++ 7.6.0-4ubuntu1/debian/changelog	2021-11-23 12:49:04.000000000 +0000
@@ -1,3 +1,11 @@
+ferret-vis (7.6.0-4ubuntu1) jammy; urgency=medium
+
+  * Merge from Debian unstable, remaining changes:
+    + Build without lto. lto-disabled-list can't be used, because
+      dpkg-buildflags is called after changing the package base directory.
+
+ -- Graham Inggs <ginggs@ubuntu.com>  Tue, 23 Nov 2021 12:49:04 +0000
+
 ferret-vis (7.6.0-4) unstable; urgency=medium
 
   * Add platform file for  gfortran-11. Closes: #984126
@@ -12,6 +20,19 @@ ferret-vis (7.6.0-3) unstable; urgency=m
 
  -- Alastair McKinstry <mckinstry@debian.org>  Mon, 27 Sep 2021 08:11:05 +0100
 
+ferret-vis (7.6.0-2ubuntu2) jammy; urgency=medium
+
+  * No-change rebuild against libnetcdf19
+
+ -- Graham Inggs <ginggs@ubuntu.com>  Sat, 30 Oct 2021 10:38:45 +0000
+
+ferret-vis (7.6.0-2ubuntu1) hirsute; urgency=medium
+
+  * Build without lto. lto-disabled-list can't be used, because dpkg-buildflags
+    is called after changing the package base directory.
+
+ -- Matthias Klose <doko@ubuntu.com>  Thu, 01 Apr 2021 14:38:14 +0200
+
 ferret-vis (7.6.0-2) unstable; urgency=medium
 
   * Switch to using libeditreadline-dev for legal reasons.
@@ -264,4 +285,4 @@ ferret-vis (6.6.2-1) unstable; urgency=l
 
   * Initial release. (Closes: #587422)
 
- -- Alastair McKinstry <mckinstry@debian.org>  Thu, 24 Jun 2010 20:42:17 +
\ No newline at end of file
+ -- Alastair McKinstry <mckinstry@debian.org>  Thu, 24 Jun 2010 20:42:17 +0100
diff -pruN 7.6.0-4/debian/control 7.6.0-4ubuntu1/debian/control
--- 7.6.0-4/debian/control	2021-10-13 12:18:31.000000000 +0000
+++ 7.6.0-4ubuntu1/debian/control	2021-11-23 12:49:04.000000000 +0000
@@ -1,7 +1,8 @@
 Source: ferret-vis
 Section: utils
 Priority: optional
-Maintainer: Alastair McKinstry <mckinstry@debian.org>
+Maintainer: Ubuntu Developers <ubuntu-devel-discuss@lists.ubuntu.com>
+XSBC-Original-Maintainer: Alastair McKinstry <mckinstry@debian.org>
 Build-Depends: debhelper-compat (= 13),
  dh-elpa,
  libeditreadline-dev, 
diff -pruN 7.6.0-4/debian/rules 7.6.0-4ubuntu1/debian/rules
--- 7.6.0-4/debian/rules	2021-10-13 12:18:31.000000000 +0000
+++ 7.6.0-4ubuntu1/debian/rules	2021-11-23 12:49:04.000000000 +0000
@@ -3,6 +3,8 @@
 # Uncomment this to turn on verbose mode.
 export DH_VERBOSE=1
 
+export DEB_BUILD_MAINT_OPTIONS = optimize=-lto
+
 # Set for reproducibility
 LC_ALL=C
 export LC_ALL