Diff of the two buildlogs:

--
--- b1/build.log	2023-06-02 15:17:36.161424804 +0000
+++ b2/build.log	2023-06-02 15:18:38.922675335 +0000
@@ -1,49 +1,8 @@
 I: pbuilder: network access will be disabled during build
-I: Current time: Thu Jul  4 09:39:55 -12 2024
-I: pbuilder-time-stamp: 1720129195
+I: Current time: Sat Jun  3 05:17:40 +14 2023
+I: pbuilder-time-stamp: 1685719060
 I: Building the build Environment
 I: extracting base tarball [/var/cache/pbuilder/bookworm-reproducible-base.tgz]
-tar: ./usr/share/doc/adduser/examples/adduser.local.conf.examples/skel: time stamp 2025-08-04 08:27:37 is 34210054.88893466 s in the future
-tar: ./usr/share/doc/adduser/examples/adduser.local.conf.examples/skel.other: time stamp 2025-08-04 08:27:37 is 34210054.88864424 s in the future
-tar: ./usr/share/doc/adduser/examples/adduser.local.conf.examples: time stamp 2025-08-04 08:27:37 is 34210054.88841404 s in the future
-tar: ./usr/share/doc/adduser/examples: time stamp 2025-08-04 08:27:37 is 34210054.8878394 s in the future
-tar: ./usr/share/doc/adduser: time stamp 2025-08-04 08:27:37 is 34210054.88742168 s in the future
-tar: ./usr/share/locale/ca/LC_MESSAGES: time stamp 2025-08-04 08:27:37 is 34210054.80838678 s in the future
-tar: ./usr/share/locale/cs/LC_MESSAGES: time stamp 2025-08-04 08:27:37 is 34210054.78960206 s in the future
-tar: ./usr/share/locale/da/LC_MESSAGES: time stamp 2025-08-04 08:27:37 is 34210054.77029342 s in the future
-tar: ./usr/share/locale/de/LC_MESSAGES: time stamp 2025-08-04 08:27:37 is 34210054.74854442 s in the future
-tar: ./usr/share/locale/es/LC_MESSAGES: time stamp 2025-08-04 08:27:37 is 34210054.70566032 s in the future
-tar: ./usr/share/locale/eu/LC_MESSAGES: time stamp 2025-08-04 08:27:37 is 34210054.70097948 s in the future
-tar: ./usr/share/locale/fr/LC_MESSAGES: time stamp 2025-08-04 08:27:37 is 34210054.64103142 s in the future
-tar: ./usr/share/locale/gl/LC_MESSAGES: time stamp 2025-08-04 08:27:37 is 34210054.63424526 s in the future
-tar: ./usr/share/locale/hu/LC_MESSAGES: time stamp 2025-08-04 08:27:37 is 34210054.6221157 s in the future
-tar: ./usr/share/locale/it/LC_MESSAGES: time stamp 2025-08-04 08:27:37 is 34210054.60511892 s in the future
-tar: ./usr/share/locale/ja/LC_MESSAGES: time stamp 2025-08-04 08:27:37 is 34210054.5839614 s in the future
-tar: ./usr/share/locale/ko/LC_MESSAGES: time stamp 2025-08-04 08:27:37 is 34210054.56756588 s in the future
-tar: ./usr/share/locale/nb/LC_MESSAGES: time stamp 2025-08-04 08:27:37 is 34210054.54828762 s in the future
-tar: ./usr/share/locale/nl/LC_MESSAGES: time stamp 2025-08-04 08:27:37 is 34210054.52478012 s in the future
-tar: ./usr/share/locale/pl/LC_MESSAGES: time stamp 2025-08-04 08:27:37 is 34210054.50334854 s in the future
-tar: ./usr/share/locale/pt/LC_MESSAGES: time stamp 2025-08-04 08:27:37 is 34210054.47805818 s in the future
-tar: ./usr/share/locale/pt_BR/LC_MESSAGES: time stamp 2025-08-04 08:27:37 is 34210054.46039944 s in the future
-tar: ./usr/share/locale/ru/LC_MESSAGES: time stamp 2025-08-04 08:27:37 is 34210054.40521992 s in the future
-tar: ./usr/share/locale/sk/LC_MESSAGES: time stamp 2025-08-04 08:27:37 is 34210054.39466434 s in the future
-tar: ./usr/share/locale/sv/LC_MESSAGES: time stamp 2025-08-04 08:27:37 is 34210054.3546884 s in the future
-tar: ./usr/share/locale/uk/LC_MESSAGES: time stamp 2025-08-04 08:27:37 is 34210054.28929382 s in the future
-tar: ./usr/share/locale/vi/LC_MESSAGES: time stamp 2025-08-04 08:27:37 is 34210054.26648872 s in the future
-tar: ./usr/share/locale/zh_CN/LC_MESSAGES: time stamp 2025-08-04 08:27:37 is 34210054.24565854 s in the future
-tar: ./usr/share/man/de/man5: time stamp 2025-08-04 08:27:37 is 34210054.11333566 s in the future
-tar: ./usr/share/man/fr/man5: time stamp 2025-08-04 08:27:37 is 34210054.10177588 s in the future
-tar: ./usr/share/man/man5: time stamp 2025-08-04 08:27:37 is 34210054.0631602 s in the future
-tar: ./usr/share/man/nl/man5: time stamp 2025-08-04 08:27:37 is 34210054.04616704 s in the future
-tar: ./usr/share/man/nl/man8: time stamp 2025-08-04 08:27:37 is 34210054.0444301 s in the future
-tar: ./usr/share/man/pt/man5: time stamp 2025-08-04 08:27:37 is 34210054.03651358 s in the future
-tar: ./usr/share/man/pt/man8: time stamp 2025-08-04 08:27:37 is 34210054.03493156 s in the future
-tar: ./usr/share/perl5/Debian: time stamp 2025-08-04 08:27:37 is 34210053.98892884 s in the future
-tar: ./var/lib/dpkg/info/adduser.list: time stamp 2025-08-04 08:27:37 is 34210051.64543562 s in the future
-tar: ./usr/sbin: time stamp 2025-08-04 08:27:37 is 34210051.45286436 s in the future
-tar: ./usr/share/man/man8: time stamp 2025-08-04 08:27:37 is 34210051.45216034 s in the future
-tar: ./usr/share/man/fr/man8: time stamp 2025-08-04 08:27:37 is 34210051.45197978 s in the future
-tar: ./usr/share/man/de/man8: time stamp 2025-08-04 08:27:37 is 34210051.45185058 s in the future
 I: copying local configuration
 W: --override-config is not set; not updating apt.conf Read the manpage for details.
 I: mounting /proc filesystem
@@ -57,7 +16,7 @@
 I: copying [./mmdebstrap_1.3.5.orig.tar.gz]
 I: copying [./mmdebstrap_1.3.5-7.debian.tar.xz]
 I: Extracting source
-gpgv: Signature made Wed May 24 17:13:29 2023 -12
+gpgv: Signature made Thu May 25 19:13:29 2023 +14
 gpgv:                using RSA key 945854E8A2FCD4B178C15AB9F2CBA5C78FBD83E1
 gpgv: Can't check signature: No public key
 dpkg-source: warning: cannot verify inline signature for ./mmdebstrap_1.3.5-7.dsc: no acceptable signature found
@@ -69,52 +28,84 @@
 dpkg-source: info: applying 0001-tests-eatmydata-via-hook-dir-jessie-or-older-dash-0..patch
 I: Not using root during the build.
 I: Installing the build-deps
-I: user script /srv/workspace/pbuilder/28265/tmp/hooks/D02_print_environment starting
+I: user script /srv/workspace/pbuilder/6128/tmp/hooks/D01_modify_environment starting
+debug: Running on codethink10-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
+'/bin/sh' -> '/bin/bash'
+lrwxrwxrwx 1 root root 9 Jun  3 05:17 /bin/sh -> /bin/bash
+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/6128/tmp/hooks/D01_modify_environment finished
+I: user script /srv/workspace/pbuilder/6128/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'
-  BUILD_ARCH='arm64'
-  DEBIAN_FRONTEND='noninteractive'
+  BASH=/bin/sh
+  BASHOPTS=checkwinsize:cmdhist:complete_fullquote:extquote:force_fignore:globasciiranges:globskipdots:hostcomplete:interactive_comments:patsub_replacement:progcomp:promptvars:sourcepath
+  BASH_ALIASES=()
+  BASH_ARGC=()
+  BASH_ARGV=()
+  BASH_CMDS=()
+  BASH_LINENO=([0]="12" [1]="0")
+  BASH_LOADABLES_PATH=/usr/local/lib/bash:/usr/lib/bash:/opt/local/lib/bash:/usr/pkg/lib/bash:/opt/pkg/lib/bash:.
+  BASH_SOURCE=([0]="/tmp/hooks/D02_print_environment" [1]="/tmp/hooks/D02_print_environment")
+  BASH_VERSINFO=([0]="5" [1]="2" [2]="15" [3]="1" [4]="release" [5]="aarch64-unknown-linux-gnu")
+  BASH_VERSION='5.2.15(1)-release'
+  BUILDDIR=/build
+  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 '
-  DISTRIBUTION='bookworm'
-  HOME='/var/lib/jenkins'
-  HOST_ARCH='arm64'
+  DIRSTACK=()
+  DISTRIBUTION=bookworm
+  EUID=0
+  FUNCNAME=([0]="Echo" [1]="main")
+  GROUPS=()
+  HOME=/var/lib/jenkins
+  HOSTNAME=i-capture-the-hostname
+  HOSTTYPE=aarch64
+  HOST_ARCH=arm64
   IFS=' 	
   '
-  LANG='C'
-  LANGUAGE='en_US:en'
-  LC_ALL='C'
-  MAIL='/var/mail/root'
-  OPTIND='1'
-  PATH='/usr/sbin:/usr/bin:/sbin:/bin:/usr/games'
-  PBCURRENTCOMMANDLINEOPERATION='build'
-  PBUILDER_OPERATION='build'
-  PBUILDER_PKGDATADIR='/usr/share/pbuilder'
-  PBUILDER_PKGLIBDIR='/usr/lib/pbuilder'
-  PBUILDER_SYSCONFDIR='/etc'
-  PPID='28265'
-  PS1='# '
-  PS2='> '
+  LANG=C
+  LANGUAGE=nl_BE:nl
+  LC_ALL=C
+  MACHTYPE=aarch64-unknown-linux-gnu
+  MAIL=/var/mail/root
+  OPTERR=1
+  OPTIND=1
+  OSTYPE=linux-gnu
+  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
+  PIPESTATUS=([0]="0")
+  POSIXLY_CORRECT=y
+  PPID=6128
   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.aagTS3Bd/pbuilderrc_5Yg1 --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.aagTS3Bd/b1 --logfile b1/build.log mmdebstrap_1.3.5-7.dsc'
-  SUDO_GID='117'
-  SUDO_UID='110'
-  SUDO_USER='jenkins'
-  TERM='unknown'
-  TZ='/usr/share/zoneinfo/Etc/GMT+12'
-  USER='root'
-  USERNAME='root'
-  _='/usr/bin/systemd-run'
-  http_proxy='http://192.168.101.16:3128'
+  PWD=/
+  SHELL=/bin/bash
+  SHELLOPTS=braceexpand:errexit:hashall:interactive-comments:posix
+  SHLVL=3
+  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.aagTS3Bd/pbuilderrc_ztxi --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.aagTS3Bd/b2 --logfile b2/build.log --extrapackages usrmerge mmdebstrap_1.3.5-7.dsc'
+  SUDO_GID=117
+  SUDO_UID=110
+  SUDO_USER=jenkins
+  TERM=unknown
+  TZ=/usr/share/zoneinfo/Etc/GMT-14
+  UID=0
+  USER=root
+  USERNAME=root
+  _='I: set'
+  http_proxy=http://192.168.101.16:3128
 I: uname -a
-  Linux codethink9-arm64 4.15.0-212-generic #223-Ubuntu SMP Tue May 23 13:09:17 UTC 2023 aarch64 GNU/Linux
+  Linux i-capture-the-hostname 4.15.0-212-generic #223-Ubuntu SMP Tue May 23 13:09:17 UTC 2023 aarch64 GNU/Linux
 I: ls -l /bin
-  lrwxrwxrwx 1 root root 7 May 26  2023 /bin -> usr/bin
-I: user script /srv/workspace/pbuilder/28265/tmp/hooks/D02_print_environment finished
+  lrwxrwxrwx 1 root root 7 Jun  3 00:26 /bin -> usr/bin
+I: user script /srv/workspace/pbuilder/6128/tmp/hooks/D02_print_environment finished
  -> Attempting to satisfy build-dependencies
  -> Creating pbuilder-satisfydepends-dummy package
 Package: pbuilder-satisfydepends-dummy
@@ -197,7 +188,7 @@
 Get: 41 http://deb.debian.org/debian bookworm/main arm64 po-debconf all 1.0.21+nmu1 [248 kB]
 Get: 42 http://deb.debian.org/debian bookworm/main arm64 debhelper all 13.11.4 [942 kB]
 Get: 43 http://deb.debian.org/debian bookworm/main arm64 help2man arm64 1.49.3 [198 kB]
-Fetched 23.9 MB in 0s (53.7 MB/s)
+Fetched 23.9 MB in 1s (34.1 MB/s)
 debconf: delaying package configuration, since apt-utils is not installed
 Selecting previously unselected package liblocale-gettext-perl.
 (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 ... 19611 files and directories currently installed.)
@@ -385,8 +376,17 @@
 Writing extended state information...
 Building tag database...
  -> Finished parsing the build-deps
+Reading package lists...
+Building dependency tree...
+Reading state information...
+usrmerge is already the newest version (35).
+0 upgraded, 0 newly installed, 0 to remove and 0 not upgraded.
 I: Building the package
-I: Running cd /build/mmdebstrap-1.3.5/ && 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  > ../mmdebstrap_1.3.5-7_source.changes
+I: user script /srv/workspace/pbuilder/6128/tmp/hooks/A99_set_merged_usr starting
+Re-configuring usrmerge...
+I: user script /srv/workspace/pbuilder/6128/tmp/hooks/A99_set_merged_usr finished
+hostname: Temporary failure in name resolution
+I: Running cd /build/mmdebstrap-1.3.5/ && 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  > ../mmdebstrap_1.3.5-7_source.changes
 dpkg-buildpackage: info: source package mmdebstrap
 dpkg-buildpackage: info: source version 1.3.5-7
 dpkg-buildpackage: info: source distribution unstable
@@ -446,12 +446,14 @@
 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/6128/tmp/hooks/B01_cleanup starting
+I: user script /srv/workspace/pbuilder/6128/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/28265 and its subdirectories
-I: Current time: Thu Jul  4 09:40:35 -12 2024
-I: pbuilder-time-stamp: 1720129235
+I: removing directory /srv/workspace/pbuilder/6128 and its subdirectories
+I: Current time: Sat Jun  3 05:18:37 +14 2023
+I: pbuilder-time-stamp: 1685719117