Diff of the two buildlogs:

--
--- b1/build.log	2024-12-21 08:39:20.821188873 +0000
+++ b2/build.log	2024-12-21 08:42:36.756267267 +0000
@@ -1,6 +1,6 @@
 I: pbuilder: network access will be disabled during build
-I: Current time: Fri Dec 20 20:36:52 -12 2024
-I: pbuilder-time-stamp: 1734770212
+I: Current time: Sat Jan 24 05:02:31 +14 2026
+I: pbuilder-time-stamp: 1769180551
 I: Building the build Environment
 I: extracting base tarball [/var/cache/pbuilder/trixie-reproducible-base.tgz]
 I: copying local configuration
@@ -30,54 +30,86 @@
 dpkg-source: info: applying sphinx-8.0.patch
 I: Not using root during the build.
 I: Installing the build-deps
-I: user script /srv/workspace/pbuilder/4054/tmp/hooks/D02_print_environment starting
+I: user script /srv/workspace/pbuilder/90589/tmp/hooks/D01_modify_environment starting
+debug: Running on ionos16-i386.
+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 Jan 23 15:03 /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/90589/tmp/hooks/D01_modify_environment finished
+I: user script /srv/workspace/pbuilder/90589/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='i386'
-  DEBIAN_FRONTEND='noninteractive'
-  DEB_BUILD_OPTIONS='buildinfo=+all reproducible=+all parallel=11 '
-  DISTRIBUTION='trixie'
-  HOME='/root'
-  HOST_ARCH='i386'
+  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]="i686-pc-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=i386
+  DEBIAN_FRONTEND=noninteractive
+  DEB_BUILD_OPTIONS='buildinfo=+all reproducible=+all parallel=21 '
+  DIRSTACK=()
+  DISTRIBUTION=trixie
+  EUID=0
+  FUNCNAME=([0]="Echo" [1]="main")
+  GROUPS=()
+  HOME=/root
+  HOSTNAME=i-capture-the-hostname
+  HOSTTYPE=i686
+  HOST_ARCH=i386
   IFS=' 	
   '
-  INVOCATION_ID='6f235f7bf3bb4406900fdc06847ddb21'
-  LANG='C'
-  LANGUAGE='en_US:en'
-  LC_ALL='C'
-  LD_LIBRARY_PATH='/usr/lib/libeatmydata'
-  LD_PRELOAD='libeatmydata.so'
-  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='4054'
-  PS1='# '
-  PS2='> '
+  INVOCATION_ID=841d42a11d0a48a2933689eac1b5ac8d
+  LANG=C
+  LANGUAGE=de_CH:de
+  LC_ALL=C
+  LD_LIBRARY_PATH=/usr/lib/libeatmydata
+  LD_PRELOAD=libeatmydata.so
+  MACHTYPE=i686-pc-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=90589
   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.Blkx9FMJ/pbuilderrc_BJPQ --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.Blkx9FMJ/b1 --logfile b1/build.log pox_0.3.5-2.dsc'
-  SUDO_GID='112'
-  SUDO_UID='107'
-  SUDO_USER='jenkins'
-  TERM='unknown'
-  TZ='/usr/share/zoneinfo/Etc/GMT+12'
-  USER='root'
-  _='/usr/bin/systemd-run'
-  http_proxy='http://46.16.76.132:3128'
+  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.Blkx9FMJ/pbuilderrc_ZUvt --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.Blkx9FMJ/b2 --logfile b2/build.log pox_0.3.5-2.dsc'
+  SUDO_GID=112
+  SUDO_UID=107
+  SUDO_USER=jenkins
+  TERM=unknown
+  TZ=/usr/share/zoneinfo/Etc/GMT-14
+  UID=0
+  USER=root
+  _='I: set'
+  http_proxy=http://213.165.73.152:3128
 I: uname -a
-  Linux ionos2-i386 6.1.0-28-amd64 #1 SMP PREEMPT_DYNAMIC Debian 6.1.119-1 (2024-11-22) x86_64 GNU/Linux
+  Linux i-capture-the-hostname 6.1.0-28-amd64 #1 SMP PREEMPT_DYNAMIC Debian 6.1.119-1 (2024-11-22) x86_64 GNU/Linux
 I: ls -l /bin
-  lrwxrwxrwx 1 root root 7 Nov 22 14:40 /bin -> usr/bin
-I: user script /srv/workspace/pbuilder/4054/tmp/hooks/D02_print_environment finished
+  lrwxrwxrwx 1 root root 7 Nov 22  2024 /bin -> usr/bin
+I: user script /srv/workspace/pbuilder/90589/tmp/hooks/D02_print_environment finished
  -> Attempting to satisfy build-dependencies
  -> Creating pbuilder-satisfydepends-dummy package
 Package: pbuilder-satisfydepends-dummy
@@ -232,7 +264,7 @@
 Get: 103 http://deb.debian.org/debian trixie/main i386 sphinx-rtd-theme-common all 3.0.2+dfsg-1 [1023 kB]
 Get: 104 http://deb.debian.org/debian trixie/main i386 python3-sphinxcontrib.jquery all 4.1-5 [7348 B]
 Get: 105 http://deb.debian.org/debian trixie/main i386 python3-sphinx-rtd-theme all 3.0.2+dfsg-1 [29.5 kB]
-Fetched 44.4 MB in 1s (54.7 MB/s)
+Fetched 44.4 MB in 3s (15.7 MB/s)
 debconf: delaying package configuration, since apt-utils is not installed
 Selecting previously unselected package fonts-lato.
 (Reading database ... 
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(Reading database ... 90%
(Reading database ... 95%
(Reading database ... 100%
(Reading database ... 19953 files and directories currently installed.)
@@ -583,8 +615,8 @@
 Setting up tzdata (2024b-4) ...
 
 Current default time zone: 'Etc/UTC'
-Local time is now:      Sat Dec 21 08:37:48 UTC 2024.
-Universal Time is now:  Sat Dec 21 08:37:48 UTC 2024.
+Local time is now:      Fri Jan 23 15:03:39 UTC 2026.
+Universal Time is now:  Fri Jan 23 15:03:39 UTC 2026.
 Run 'dpkg-reconfigure tzdata' if you wish to change it.
 
 Setting up autotools-dev (20220109.1) ...
@@ -691,7 +723,11 @@
 Building tag database...
  -> Finished parsing the build-deps
 I: Building the package
-I: Running cd /build/reproducible-path/pox-0.3.5/ && 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  > ../pox_0.3.5-2_source.changes
+I: user script /srv/workspace/pbuilder/90589/tmp/hooks/A99_set_merged_usr starting
+Not re-configuring usrmerge for trixie
+I: user script /srv/workspace/pbuilder/90589/tmp/hooks/A99_set_merged_usr finished
+hostname: Name or service not known
+I: Running cd /build/reproducible-path/pox-0.3.5/ && 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  > ../pox_0.3.5-2_source.changes
 dpkg-buildpackage: info: source package pox
 dpkg-buildpackage: info: source version 0.3.5-2
 dpkg-buildpackage: info: source distribution unstable
@@ -723,16 +759,16 @@
 running build
 running build_py
 creating build/lib/pox
-copying pox/shutils.py -> build/lib/pox
 copying pox/__main__.py -> build/lib/pox
 copying pox/__info__.py -> build/lib/pox
-copying pox/_disk.py -> build/lib/pox
+copying pox/shutils.py -> build/lib/pox
 copying pox/__init__.py -> build/lib/pox
 copying pox/utils.py -> build/lib/pox
+copying pox/_disk.py -> build/lib/pox
 creating build/lib/pox/tests
-copying pox/tests/test_shutils.py -> build/lib/pox/tests
 copying pox/tests/__main__.py -> build/lib/pox/tests
 copying pox/tests/test_utils.py -> build/lib/pox/tests
+copying pox/tests/test_shutils.py -> build/lib/pox/tests
 copying pox/tests/__init__.py -> build/lib/pox/tests
 running build_scripts
 creating build/scripts-3.12
@@ -743,17 +779,17 @@
 running install_lib
 creating build/bdist.linux-i686/wheel
 creating build/bdist.linux-i686/wheel/pox
+copying build/lib/pox/__main__.py -> build/bdist.linux-i686/wheel/./pox
+copying build/lib/pox/__info__.py -> build/bdist.linux-i686/wheel/./pox
 copying build/lib/pox/shutils.py -> build/bdist.linux-i686/wheel/./pox
+copying build/lib/pox/__init__.py -> build/bdist.linux-i686/wheel/./pox
+copying build/lib/pox/utils.py -> build/bdist.linux-i686/wheel/./pox
+copying build/lib/pox/_disk.py -> build/bdist.linux-i686/wheel/./pox
 creating build/bdist.linux-i686/wheel/pox/tests
-copying build/lib/pox/tests/test_shutils.py -> build/bdist.linux-i686/wheel/./pox/tests
 copying build/lib/pox/tests/__main__.py -> build/bdist.linux-i686/wheel/./pox/tests
 copying build/lib/pox/tests/test_utils.py -> build/bdist.linux-i686/wheel/./pox/tests
+copying build/lib/pox/tests/test_shutils.py -> build/bdist.linux-i686/wheel/./pox/tests
 copying build/lib/pox/tests/__init__.py -> build/bdist.linux-i686/wheel/./pox/tests
-copying build/lib/pox/__main__.py -> build/bdist.linux-i686/wheel/./pox
-copying build/lib/pox/__info__.py -> build/bdist.linux-i686/wheel/./pox
-copying build/lib/pox/_disk.py -> build/bdist.linux-i686/wheel/./pox
-copying build/lib/pox/__init__.py -> build/bdist.linux-i686/wheel/./pox
-copying build/lib/pox/utils.py -> build/bdist.linux-i686/wheel/./pox
 running install_egg_info
 running egg_info
 creating pox.egg-info
@@ -774,7 +810,7 @@
 copying build/scripts-3.12/pox -> build/bdist.linux-i686/wheel/pox-0.3.5.data/scripts
 changing mode of build/bdist.linux-i686/wheel/pox-0.3.5.data/scripts/pox to 755
 creating build/bdist.linux-i686/wheel/pox-0.3.5.dist-info/WHEEL
-creating '/build/reproducible-path/pox-0.3.5/.pybuild/cpython3_3.12_pox/.tmp-oaf8699f/pox-0.3.5-py3-none-any.whl' and adding 'build/bdist.linux-i686/wheel' to it
+creating '/build/reproducible-path/pox-0.3.5/.pybuild/cpython3_3.12_pox/.tmp-r11ftpvn/pox-0.3.5-py3-none-any.whl' and adding 'build/bdist.linux-i686/wheel' to it
 adding 'pox/__info__.py'
 adding 'pox/__init__.py'
 adding 'pox/__main__.py'
@@ -805,7 +841,7 @@
 Converting `source_suffix = '.rst'` to `source_suffix = {'.rst': 'restructuredtext'}`.
 loading intersphinx inventory 'python' from https://docs.python.org/objects.inv ...
 WARNING: failed to reach any of the inventories with the following issues:
-intersphinx inventory 'https://docs.python.org/objects.inv' not fetchable due to <class 'requests.exceptions.ConnectionError'>: HTTPSConnectionPool(host='docs.python.org', port=443): Max retries exceeded with url: /objects.inv (Caused by NameResolutionError("<urllib3.connection.HTTPSConnection object at 0xf5e88d98>: Failed to resolve 'docs.python.org' ([Errno -3] Temporary failure in name resolution)"))
+intersphinx inventory 'https://docs.python.org/objects.inv' not fetchable due to <class 'requests.exceptions.ConnectionError'>: HTTPSConnectionPool(host='docs.python.org', port=443): Max retries exceeded with url: /objects.inv (Caused by NameResolutionError("<urllib3.connection.HTTPSConnection object at 0xf5ec6db0>: Failed to resolve 'docs.python.org' ([Errno -3] Temporary failure in name resolution)"))
 building [mo]: targets for 0 po files that are out of date
 writing output... 
 building [html]: targets for 3 source files that are out of date
@@ -820,9 +856,9 @@
 preparing documents... done
 copying assets... 
 copying static files... 
-Writing evaluated template result to /build/reproducible-path/pox-0.3.5/docs/build/_static/documentation_options.js
 Writing evaluated template result to /build/reproducible-path/pox-0.3.5/docs/build/_static/basic.css
 Writing evaluated template result to /build/reproducible-path/pox-0.3.5/docs/build/_static/language_data.js
+Writing evaluated template result to /build/reproducible-path/pox-0.3.5/docs/build/_static/documentation_options.js
 Writing evaluated template result to /build/reproducible-path/pox-0.3.5/docs/build/_static/alabaster.css
 copying static files: done
 copying extra files... 
@@ -872,8 +908,8 @@
 dpkg-gencontrol: warning: package python-pox-doc: substitution variable ${sphinxdoc:Built-Using} unused, but is defined
    dh_md5sums -O--buildsystem=pybuild
    dh_builddeb -O--buildsystem=pybuild
-dpkg-deb: building package 'python-pox-doc' in '../python-pox-doc_0.3.5-2_all.deb'.
 dpkg-deb: building package 'python3-pox' in '../python3-pox_0.3.5-2_all.deb'.
+dpkg-deb: building package 'python-pox-doc' in '../python-pox-doc_0.3.5-2_all.deb'.
  dpkg-genbuildinfo --build=binary -O../pox_0.3.5-2_i386.buildinfo
  dpkg-genchanges --build=binary -O../pox_0.3.5-2_i386.changes
 dpkg-genchanges: info: binary-only upload (no source code included)
@@ -881,12 +917,14 @@
 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/90589/tmp/hooks/B01_cleanup starting
+I: user script /srv/workspace/pbuilder/90589/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/4054 and its subdirectories
-I: Current time: Fri Dec 20 20:39:19 -12 2024
-I: pbuilder-time-stamp: 1734770359
+I: removing directory /srv/workspace/pbuilder/90589 and its subdirectories
+I: Current time: Sat Jan 24 05:05:34 +14 2026
+I: pbuilder-time-stamp: 1769180734