Diff of the two buildlogs:

--
--- b1/build.log	2023-04-11 07:52:49.630390197 +0000
+++ b2/build.log	2023-04-11 07:56:23.519293776 +0000
@@ -1,6 +1,6 @@
 I: pbuilder: network access will be disabled during build
-I: Current time: Mon Apr 10 19:50:24 -12 2023
-I: pbuilder-time-stamp: 1681199424
+I: Current time: Tue May 14 04:15:53 +14 2024
+I: pbuilder-time-stamp: 1715609753
 I: Building the build Environment
 I: extracting base tarball [/var/cache/pbuilder/bookworm-reproducible-base.tgz]
 I: copying local configuration
@@ -16,7 +16,7 @@
 I: copying [./guifications_2.16.orig.tar.gz]
 I: copying [./guifications_2.16-2.debian.tar.gz]
 I: Extracting source
-gpgv: Signature made Tue Jun 21 08:48:30 2011 -12
+gpgv: Signature made Wed Jun 22 10:48:30 2011 +14
 gpgv:                using DSA key E544DE079B7C328D
 gpgv: Can't check signature: No public key
 dpkg-source: warning: cannot verify inline signature for ./guifications_2.16-2.dsc: no acceptable signature found
@@ -27,11 +27,20 @@
 dpkg-source: info: applying check-no-new-version
 I: using fakeroot in build.
 I: Installing the build-deps
-I: user script /srv/workspace/pbuilder/11728/tmp/hooks/D02_print_environment starting
+I: user script /srv/workspace/pbuilder/4263/tmp/hooks/D01_modify_environment starting
+debug: Running on codethink15-arm64.
+I: Changing host+domainname to test build reproducibility
+I: Adding a custom variable just for the fun of it...
+I: Changing /bin/sh to bash
+lrwxrwxrwx 1 root root 4 Jan  6  2023 /bin/sh -> dash
+I: Setting pbuilder2's login shell to /bin/bash
+I: Setting pbuilder2's GECOS to second user,second room,second work-phone,second home-phone,second other
+I: user script /srv/workspace/pbuilder/4263/tmp/hooks/D01_modify_environment finished
+I: user script /srv/workspace/pbuilder/4263/tmp/hooks/D02_print_environment starting
 I: set
   BUILDDIR='/build'
-  BUILDUSERGECOS='first user,first room,first work-phone,first home-phone,first other'
-  BUILDUSERNAME='pbuilder1'
+  BUILDUSERGECOS='second user,second room,second work-phone,second home-phone,second other'
+  BUILDUSERNAME='pbuilder2'
   BUILD_ARCH='arm64'
   DEBIAN_FRONTEND='noninteractive'
   DEB_BUILD_OPTIONS='buildinfo=+all reproducible=+all parallel=8'
@@ -41,38 +50,38 @@
   IFS=' 	
   '
   LANG='C'
-  LANGUAGE='en_US:en'
+  LANGUAGE='nl_BE:nl'
   LC_ALL='C'
   MAIL='/var/mail/root'
   OPTIND='1'
-  PATH='/usr/sbin:/usr/bin:/sbin:/bin:/usr/games'
+  PATH='/usr/sbin:/usr/bin:/sbin:/bin:/usr/games:/i/capture/the/path'
   PBCURRENTCOMMANDLINEOPERATION='build'
   PBUILDER_OPERATION='build'
   PBUILDER_PKGDATADIR='/usr/share/pbuilder'
   PBUILDER_PKGLIBDIR='/usr/lib/pbuilder'
   PBUILDER_SYSCONFDIR='/etc'
-  PPID='11728'
+  PPID='4263'
   PS1='# '
   PS2='> '
   PS4='+ '
   PWD='/'
   SHELL='/bin/bash'
   SHLVL='2'
-  SUDO_COMMAND='/usr/bin/timeout -k 18.1h 18h /usr/bin/ionice -c 3 /usr/bin/nice /usr/sbin/pbuilder --build --configfile /srv/reproducible-results/rbuild-debian/r-b-build.hJniq7mE/pbuilderrc_OILy --distribution bookworm --hookdir /etc/pbuilder/first-build-hooks --debbuildopts -b --basetgz /var/cache/pbuilder/bookworm-reproducible-base.tgz --buildresult /srv/reproducible-results/rbuild-debian/r-b-build.hJniq7mE/b1 --logfile b1/build.log guifications_2.16-2.dsc'
+  SUDO_COMMAND='/usr/bin/timeout -k 24.1h 24h /usr/bin/ionice -c 3 /usr/bin/nice -n 11 /usr/bin/unshare --uts -- /usr/sbin/pbuilder --build --configfile /srv/reproducible-results/rbuild-debian/r-b-build.hJniq7mE/pbuilderrc_GrbN --distribution bookworm --hookdir /etc/pbuilder/rebuild-hooks --debbuildopts -b --basetgz /var/cache/pbuilder/bookworm-reproducible-base.tgz --buildresult /srv/reproducible-results/rbuild-debian/r-b-build.hJniq7mE/b2 --logfile b2/build.log --extrapackages usrmerge guifications_2.16-2.dsc'
   SUDO_GID='117'
   SUDO_UID='110'
   SUDO_USER='jenkins'
   TERM='unknown'
-  TZ='/usr/share/zoneinfo/Etc/GMT+12'
+  TZ='/usr/share/zoneinfo/Etc/GMT-14'
   USER='root'
   USERNAME='root'
   _='/usr/bin/systemd-run'
   http_proxy='http://192.168.101.16:3128'
 I: uname -a
-  Linux codethink14-arm64 4.15.0-208-generic #220-Ubuntu SMP Mon Mar 20 14:28:12 UTC 2023 aarch64 GNU/Linux
+  Linux i-capture-the-hostname 4.15.0-208-generic #220-Ubuntu SMP Mon Mar 20 14:28:12 UTC 2023 aarch64 GNU/Linux
 I: ls -l /bin
-  lrwxrwxrwx 1 root root 7 Apr  9 22:24 /bin -> usr/bin
-I: user script /srv/workspace/pbuilder/11728/tmp/hooks/D02_print_environment finished
+  lrwxrwxrwx 1 root root 7 May 13 06:47 /bin -> usr/bin
+I: user script /srv/workspace/pbuilder/4263/tmp/hooks/D02_print_environment finished
  -> Attempting to satisfy build-dependencies
  -> Creating pbuilder-satisfydepends-dummy package
 Package: pbuilder-satisfydepends-dummy
@@ -427,7 +436,7 @@
 Get: 303 http://deb.debian.org/debian bookworm/main arm64 pidgin arm64 2.14.12-1 [543 kB]
 Get: 304 http://deb.debian.org/debian bookworm/main arm64 pidgin-dev arm64 2.14.12-1 [1765 kB]
 Get: 305 http://deb.debian.org/debian bookworm/main arm64 quilt all 0.67+really0.66-1 [303 kB]
-Fetched 111 MB in 3s (31.7 MB/s)
+Fetched 111 MB in 3s (37.8 MB/s)
 debconf: delaying package configuration, since apt-utils is not installed
 Selecting previously unselected package libargon2-1:arm64.
 (Reading database ... 
(Reading database ... 5%
(Reading database ... 10%
(Reading database ... 15%
(Reading database ... 20%
(Reading database ... 25%
(Reading database ... 30%
(Reading database ... 35%
(Reading database ... 40%
(Reading database ... 45%
(Reading database ... 50%
(Reading database ... 55%
(Reading database ... 60%
(Reading database ... 65%
(Reading database ... 70%
(Reading database ... 75%
(Reading database ... 80%
(Reading database ... 85%
(Reading database ... 90%
(Reading database ... 95%
(Reading database ... 100%
(Reading database ... 19616 files and directories currently installed.)
@@ -1693,10 +1702,15 @@
 Reading package lists...
 Building dependency tree...
 Reading state information...
+usrmerge is already the newest version (35).
 fakeroot is already the newest version (1.31-1.2).
 0 upgraded, 0 newly installed, 0 to remove and 0 not upgraded.
 I: Building the package
-I: Running cd /build/guifications-2.16/ && env PATH="/usr/sbin:/usr/bin:/sbin:/bin:/usr/games" HOME="/nonexistent/first-build" dpkg-buildpackage -us -uc -b && env PATH="/usr/sbin:/usr/bin:/sbin:/bin:/usr/games" HOME="/nonexistent/first-build" dpkg-genchanges -S  > ../guifications_2.16-2_source.changes
+I: user script /srv/workspace/pbuilder/4263/tmp/hooks/A99_set_merged_usr starting
+Re-configuring usrmerge...
+I: user script /srv/workspace/pbuilder/4263/tmp/hooks/A99_set_merged_usr finished
+hostname: Temporary failure in name resolution
+I: Running cd /build/guifications-2.16/ && env PATH="/usr/sbin:/usr/bin:/sbin:/bin:/usr/games:/i/capture/the/path" HOME="/nonexistent/second-build" dpkg-buildpackage -us -uc -b && env PATH="/usr/sbin:/usr/bin:/sbin:/bin:/usr/games:/i/capture/the/path" HOME="/nonexistent/second-build" dpkg-genchanges -S  > ../guifications_2.16-2_source.changes
 dpkg-buildpackage: info: source package guifications
 dpkg-buildpackage: info: source version 2.16-2
 dpkg-buildpackage: info: source distribution unstable
@@ -2986,14 +3000,6 @@
 	Normalized debian/pidgin-guifications/usr/share/locale/sr@Latn/LC_MESSAGES/guifications.mo
 	Normalized debian/pidgin-guifications/usr/share/locale/sr/LC_MESSAGES/guifications.mo
 	Normalized debian/pidgin-guifications/usr/share/locale/sk/LC_MESSAGES/guifications.mo
-debian/pidgin-guifications/usr/share/pixmaps/pidgin/guifications/themes/Penguins/penguin.png: 2741 bytes of garbage after IEND chunk at /usr/share/perl5/File/StripNondeterminism/handlers/png.pm line 172.
-	Normalized debian/pidgin-guifications/usr/share/locale/it/LC_MESSAGES/guifications.mo
-	Normalized debian/pidgin-guifications/usr/share/locale/hu/LC_MESSAGES/guifications.mo
-	Normalized debian/pidgin-guifications/usr/share/locale/he/LC_MESSAGES/guifications.mo
-	Normalized debian/pidgin-guifications/usr/share/locale/gl/LC_MESSAGES/guifications.mo
-	Normalized debian/pidgin-guifications/usr/share/locale/fr/LC_MESSAGES/guifications.mo
-	Normalized debian/pidgin-guifications/usr/share/locale/es/LC_MESSAGES/guifications.mo
-	Normalized debian/pidgin-guifications/usr/share/locale/en_GB/LC_MESSAGES/guifications.mo
 	Normalized debian/pidgin-guifications/usr/share/locale/ru/LC_MESSAGES/guifications.mo
 	Normalized debian/pidgin-guifications/usr/share/locale/pt_BR/LC_MESSAGES/guifications.mo
 	Normalized debian/pidgin-guifications/usr/share/locale/pt/LC_MESSAGES/guifications.mo
@@ -3001,6 +3007,14 @@
 	Normalized debian/pidgin-guifications/usr/share/locale/nl/LC_MESSAGES/guifications.mo
 	Normalized debian/pidgin-guifications/usr/share/locale/mk/LC_MESSAGES/guifications.mo
 	Normalized debian/pidgin-guifications/usr/share/locale/ja/LC_MESSAGES/guifications.mo
+	Normalized debian/pidgin-guifications/usr/share/locale/it/LC_MESSAGES/guifications.mo
+	Normalized debian/pidgin-guifications/usr/share/locale/hu/LC_MESSAGES/guifications.mo
+	Normalized debian/pidgin-guifications/usr/share/locale/he/LC_MESSAGES/guifications.mo
+	Normalized debian/pidgin-guifications/usr/share/locale/gl/LC_MESSAGES/guifications.mo
+	Normalized debian/pidgin-guifications/usr/share/locale/fr/LC_MESSAGES/guifications.mo
+	Normalized debian/pidgin-guifications/usr/share/locale/es/LC_MESSAGES/guifications.mo
+	Normalized debian/pidgin-guifications/usr/share/locale/en_GB/LC_MESSAGES/guifications.mo
+debian/pidgin-guifications/usr/share/pixmaps/pidgin/guifications/themes/Penguins/penguin.png: 2741 bytes of garbage after IEND chunk at /usr/share/perl5/File/StripNondeterminism/handlers/png.pm line 172.
 	Normalized debian/pidgin-guifications/usr/share/locale/en_AU/LC_MESSAGES/guifications.mo
 	Normalized debian/pidgin-guifications/usr/share/locale/de/LC_MESSAGES/guifications.mo
 	Normalized debian/pidgin-guifications/usr/share/locale/cs/LC_MESSAGES/guifications.mo
@@ -3015,7 +3029,7 @@
 dh_perl -ppidgin-guifications 
 dh_shlibdeps -ppidgin-guifications 
 dh_shlibdeps: warning: Compatibility levels before 10 are deprecated (level 7 in use)
-dpkg-shlibdeps: warning: debian/pidgin-guifications/usr/lib/pidgin/guifications.so contains an unresolvable reference to symbol XFree: it's probably a plugin
+dpkg-shlibdeps: warning: debian/pidgin-guifications/usr/lib/pidgin/guifications.so contains an unresolvable reference to symbol pidgin_new_check_item: it's probably a plugin
 dpkg-shlibdeps: warning: 22 other similar warnings have been skipped (use -v to see them all)
 dh_gencontrol -ppidgin-guifications  
 # only call dh_scour for packages in main
@@ -3031,12 +3045,14 @@
 dpkg-buildpackage: info: binary-only upload (no source included)
 dpkg-genchanges: info: not including original source code in upload
 I: copying local configuration
+I: user script /srv/workspace/pbuilder/4263/tmp/hooks/B01_cleanup starting
+I: user script /srv/workspace/pbuilder/4263/tmp/hooks/B01_cleanup finished
 I: unmounting dev/ptmx filesystem
 I: unmounting dev/pts filesystem
 I: unmounting dev/shm filesystem
 I: unmounting proc filesystem
 I: unmounting sys filesystem
 I: cleaning the build env 
-I: removing directory /srv/workspace/pbuilder/11728 and its subdirectories
-I: Current time: Mon Apr 10 19:52:48 -12 2023
-I: pbuilder-time-stamp: 1681199568
+I: removing directory /srv/workspace/pbuilder/4263 and its subdirectories
+I: Current time: Tue May 14 04:19:21 +14 2024
+I: pbuilder-time-stamp: 1715609961