Diff of the two buildlogs:

--
--- b1/build.log	2024-12-25 05:50:02.609423139 +0000
+++ b2/build.log	2024-12-25 05:57:55.983920900 +0000
@@ -1,6 +1,6 @@
 I: pbuilder: network access will be disabled during build
-I: Current time: Tue Jan 27 00:10:12 -12 2026
-I: pbuilder-time-stamp: 1769515812
+I: Current time: Wed Dec 25 19:50:05 +14 2024
+I: pbuilder-time-stamp: 1735105805
 I: Building the build Environment
 I: extracting base tarball [/var/cache/pbuilder/trixie-reproducible-base.tgz]
 I: copying local configuration
@@ -24,52 +24,84 @@
 dpkg-source: info: unpacking reprotest_0.7.29.tar.xz
 I: Not using root during the build.
 I: Installing the build-deps
-I: user script /srv/workspace/pbuilder/2084074/tmp/hooks/D02_print_environment starting
+I: user script /srv/workspace/pbuilder/3224645/tmp/hooks/D01_modify_environment starting
+debug: Running on codethink04-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 Dec 25 05:50 /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/3224645/tmp/hooks/D01_modify_environment finished
+I: user script /srv/workspace/pbuilder/3224645/tmp/hooks/D02_print_environment starting
 I: set
-  BUILDDIR='/build/reproducible-path'
-  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]="37" [3]="1" [4]="release" [5]="aarch64-unknown-linux-gnu")
+  BASH_VERSION='5.2.37(1)-release'
+  BUILDDIR=/build/reproducible-path
+  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=12 '
-  DISTRIBUTION='trixie'
-  HOME='/root'
-  HOST_ARCH='arm64'
+  DIRSTACK=()
+  DISTRIBUTION=trixie
+  EUID=0
+  FUNCNAME=([0]="Echo" [1]="main")
+  GROUPS=()
+  HOME=/root
+  HOSTNAME=i-capture-the-hostname
+  HOSTTYPE=aarch64
+  HOST_ARCH=arm64
   IFS=' 	
   '
-  INVOCATION_ID='3c70ff87f84d4c5abfd7afa516480ea0'
-  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='2084074'
-  PS1='# '
-  PS2='> '
+  INVOCATION_ID=f6674fa64fb644919605b38acf906756
+  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=3224645
   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.NYhYdLXq/pbuilderrc_m7yy --distribution trixie --hookdir /etc/pbuilder/first-build-hooks --debbuildopts -b --basetgz /var/cache/pbuilder/trixie-reproducible-base.tgz --buildresult /srv/reproducible-results/rbuild-debian/r-b-build.NYhYdLXq/b1 --logfile b1/build.log reprotest_0.7.29.dsc'
-  SUDO_GID='109'
-  SUDO_UID='104'
-  SUDO_USER='jenkins'
-  TERM='unknown'
-  TZ='/usr/share/zoneinfo/Etc/GMT+12'
-  USER='root'
-  _='/usr/bin/systemd-run'
-  http_proxy='http://192.168.101.4:3128'
+  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.NYhYdLXq/pbuilderrc_Qx8Q --distribution trixie --hookdir /etc/pbuilder/rebuild-hooks --debbuildopts -b --basetgz /var/cache/pbuilder/trixie-reproducible-base.tgz --buildresult /srv/reproducible-results/rbuild-debian/r-b-build.NYhYdLXq/b2 --logfile b2/build.log reprotest_0.7.29.dsc'
+  SUDO_GID=109
+  SUDO_UID=104
+  SUDO_USER=jenkins
+  TERM=unknown
+  TZ=/usr/share/zoneinfo/Etc/GMT-14
+  UID=0
+  USER=root
+  _='I: set'
+  http_proxy=http://192.168.101.4:3128
 I: uname -a
-  Linux codethink03-arm64 6.1.0-28-cloud-arm64 #1 SMP Debian 6.1.119-1 (2024-11-22) aarch64 GNU/Linux
+  Linux i-capture-the-hostname 6.1.0-28-cloud-arm64 #1 SMP Debian 6.1.119-1 (2024-11-22) aarch64 GNU/Linux
 I: ls -l /bin
-  lrwxrwxrwx 1 root root 7 Nov 22  2024 /bin -> usr/bin
-I: user script /srv/workspace/pbuilder/2084074/tmp/hooks/D02_print_environment finished
+  lrwxrwxrwx 1 root root 7 Nov 22 14:40 /bin -> usr/bin
+I: user script /srv/workspace/pbuilder/3224645/tmp/hooks/D02_print_environment finished
  -> Attempting to satisfy build-dependencies
  -> Creating pbuilder-satisfydepends-dummy package
 Package: pbuilder-satisfydepends-dummy
@@ -397,7 +429,7 @@
 Get: 258 http://deb.debian.org/debian trixie/main arm64 python3-wheel all 0.45.1-1 [56.7 kB]
 Get: 259 http://deb.debian.org/debian trixie/main arm64 tox all 4.23.0-1 [393 kB]
 Get: 260 http://deb.debian.org/debian trixie/main arm64 xxd arm64 2:9.1.0861-1 [97.7 kB]
-Fetched 56.9 MB in 0s (136 MB/s)
+Fetched 56.9 MB in 1s (99.4 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 ... 20082 files and directories currently installed.)
@@ -1256,8 +1288,8 @@
 Setting up tzdata (2024b-4) ...
 
 Current default time zone: 'Etc/UTC'
-Local time is now:      Tue Jan 27 12:10:47 UTC 2026.
-Universal Time is now:  Tue Jan 27 12:10:47 UTC 2026.
+Local time is now:      Wed Dec 25 05:51:18 UTC 2024.
+Universal Time is now:  Wed Dec 25 05:51:18 UTC 2024.
 Run 'dpkg-reconfigure tzdata' if you wish to change it.
 
 Setting up libpython3.13-minimal:arm64 (3.13.1-2) ...
@@ -1488,7 +1520,11 @@
 Building tag database...
  -> Finished parsing the build-deps
 I: Building the package
-I: Running cd /build/reproducible-path/reprotest-0.7.29/ && 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  > ../reprotest_0.7.29_source.changes
+I: user script /srv/workspace/pbuilder/3224645/tmp/hooks/A99_set_merged_usr starting
+Not re-configuring usrmerge for trixie
+I: user script /srv/workspace/pbuilder/3224645/tmp/hooks/A99_set_merged_usr finished
+hostname: Name or service not known
+I: Running cd /build/reproducible-path/reprotest-0.7.29/ && 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  > ../reprotest_0.7.29_source.changes
 dpkg-buildpackage: info: source package reprotest
 dpkg-buildpackage: info: source version 0.7.29
 dpkg-buildpackage: info: source distribution unstable
@@ -1900,9 +1936,9 @@
     parts = re.split(r"(\+=|-=|\+\+|--|=|\+|-|@)", action, 1)
 
 -- Docs: https://docs.pytest.org/en/stable/how-to/capture-warnings.html
-======================= 21 passed, 19 warnings in 39.55s =======================
-  py313: OK (43.39=setup[3.18]+cmd[40.21] seconds)
-  congratulations :) (43.49 seconds)
+================= 21 passed, 19 warnings in 127.39s (0:02:07) ==================
+  py313: OK (137.62=setup[8.21]+cmd[129.41] seconds)
+  congratulations :) (137.92 seconds)
 I: pybuild base:311: /usr/bin/python3 -c "import setuptools, runpy; runpy.run_path('setup.py')" bdist_wheel 
 running bdist_wheel
 running build
@@ -2053,9 +2089,9 @@
 tests/test_reprotest.py ..................                               [ 90%]
 tests/test_shell.py ..                                                   [100%]
 
-============================= 21 passed in 41.13s ==============================
-  py312: OK (44.78=setup[2.81]+cmd[41.97] seconds)
-  congratulations :) (44.88 seconds)
+======================== 21 passed in 115.56s (0:01:55) ========================
+  py312: OK (126.01=setup[7.84]+cmd[118.16] seconds)
+  congratulations :) (126.45 seconds)
 make[1]: Leaving directory '/build/reproducible-path/reprotest-0.7.29'
    create-stamp debian/debhelper-build-stamp
    dh_testroot -O--buildsystem=pybuild
@@ -2325,12 +2361,14 @@
 dpkg-buildpackage: info: binary-only upload (no source included)
 dpkg-genchanges: info: including full source code in upload
 I: copying local configuration
+I: user script /srv/workspace/pbuilder/3224645/tmp/hooks/B01_cleanup starting
+I: user script /srv/workspace/pbuilder/3224645/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/2084074 and its subdirectories
-I: Current time: Tue Jan 27 00:13:00 -12 2026
-I: pbuilder-time-stamp: 1769515980
+I: removing directory /srv/workspace/pbuilder/3224645 and its subdirectories
+I: Current time: Wed Dec 25 19:57:54 +14 2024
+I: pbuilder-time-stamp: 1735106274