Diff of the two buildlogs:

--
--- b1/build.log	2025-01-17 13:13:15.182611797 +0000
+++ b2/build.log	2025-01-17 13:23:04.907874117 +0000
@@ -1,6 +1,6 @@
 I: pbuilder: network access will be disabled during build
-I: Current time: Fri Jan 17 01:07:47 -12 2025
-I: pbuilder-time-stamp: 1737119267
+I: Current time: Sat Jan 18 03:16:51 +14 2025
+I: pbuilder-time-stamp: 1737119811
 I: Building the build Environment
 I: extracting base tarball [/var/cache/pbuilder/unstable-reproducible-base.tgz]
 I: copying local configuration
@@ -25,52 +25,84 @@
 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/20039/tmp/hooks/D02_print_environment starting
+I: user script /srv/workspace/pbuilder/1023/tmp/hooks/D01_modify_environment starting
+debug: Running on virt32c.
+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 17 13:17 /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/1023/tmp/hooks/D01_modify_environment finished
+I: user script /srv/workspace/pbuilder/1023/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='armhf'
-  DEBIAN_FRONTEND='noninteractive'
-  DEB_BUILD_OPTIONS='buildinfo=+all reproducible=+all parallel=3 '
-  DISTRIBUTION='unstable'
-  HOME='/root'
-  HOST_ARCH='armhf'
+  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]="arm-unknown-linux-gnueabihf")
+  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=armhf
+  DEBIAN_FRONTEND=noninteractive
+  DEB_BUILD_OPTIONS='buildinfo=+all reproducible=+all parallel=4 '
+  DIRSTACK=()
+  DISTRIBUTION=unstable
+  EUID=0
+  FUNCNAME=([0]="Echo" [1]="main")
+  GROUPS=()
+  HOME=/root
+  HOSTNAME=i-capture-the-hostname
+  HOSTTYPE=arm
+  HOST_ARCH=armhf
   IFS=' 	
   '
-  INVOCATION_ID='dbedcb80f1aa4720bc48d50b0b8bd61e'
-  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='20039'
-  PS1='# '
-  PS2='> '
+  INVOCATION_ID=ff2c84faf4e042238949c612d4aaa636
+  LANG=C
+  LANGUAGE=it_CH:it
+  LC_ALL=C
+  MACHTYPE=arm-unknown-linux-gnueabihf
+  MAIL=/var/mail/root
+  OPTERR=1
+  OPTIND=1
+  OSTYPE=linux-gnueabihf
+  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=1023
   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.YZCOg4Pz/pbuilderrc_LjjX --distribution unstable --hookdir /etc/pbuilder/first-build-hooks --debbuildopts -b --basetgz /var/cache/pbuilder/unstable-reproducible-base.tgz --buildresult /srv/reproducible-results/rbuild-debian/r-b-build.YZCOg4Pz/b1 --logfile b1/build.log python-cai_1.0.4-1.dsc'
-  SUDO_GID='113'
-  SUDO_UID='107'
-  SUDO_USER='jenkins'
-  TERM='unknown'
-  TZ='/usr/share/zoneinfo/Etc/GMT+12'
-  USER='root'
-  _='/usr/bin/systemd-run'
-  http_proxy='http://10.0.0.15:3142/'
+  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.YZCOg4Pz/pbuilderrc_a3qh --distribution unstable --hookdir /etc/pbuilder/rebuild-hooks --debbuildopts -b --basetgz /var/cache/pbuilder/unstable-reproducible-base.tgz --buildresult /srv/reproducible-results/rbuild-debian/r-b-build.YZCOg4Pz/b2 --logfile b2/build.log python-cai_1.0.4-1.dsc'
+  SUDO_GID=113
+  SUDO_UID=107
+  SUDO_USER=jenkins
+  TERM=unknown
+  TZ=/usr/share/zoneinfo/Etc/GMT-14
+  UID=0
+  USER=root
+  _='I: set'
+  http_proxy=http://10.0.0.15:3142/
 I: uname -a
-  Linux virt64c 6.1.0-30-arm64 #1 SMP Debian 6.1.124-1 (2025-01-12) aarch64 GNU/Linux
+  Linux i-capture-the-hostname 6.1.0-30-armmp-lpae #1 SMP Debian 6.1.124-1 (2025-01-12) armv7l GNU/Linux
 I: ls -l /bin
   lrwxrwxrwx 1 root root 7 Nov 22 14:40 /bin -> usr/bin
-I: user script /srv/workspace/pbuilder/20039/tmp/hooks/D02_print_environment finished
+I: user script /srv/workspace/pbuilder/1023/tmp/hooks/D02_print_environment finished
  -> Attempting to satisfy build-dependencies
  -> Creating pbuilder-satisfydepends-dummy package
 Package: pbuilder-satisfydepends-dummy
@@ -302,7 +334,7 @@
 Get: 166 http://deb.debian.org/debian unstable/main armhf sphinx-common all 8.1.3-4 [616 kB]
 Get: 167 http://deb.debian.org/debian unstable/main armhf python3-sphinx all 8.1.3-4 [468 kB]
 Get: 168 http://deb.debian.org/debian unstable/main armhf python3-sphinxcontrib.programoutput all 0.17-6 [19.7 kB]
-Fetched 92.6 MB in 1s (64.4 MB/s)
+Fetched 92.6 MB in 4s (22.0 MB/s)
 Preconfiguring packages ...
 Selecting previously unselected package liblocale-gettext-perl.
 (Reading database ... 
(Reading database ... 5%
(Reading database ... 10%
(Reading database ... 15%
(Reading database ... 20%
(Reading database ... 25%
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(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 ... 19564 files and directories currently installed.)
@@ -858,8 +890,8 @@
 Setting up tzdata (2024b-6) ...
 
 Current default time zone: 'Etc/UTC'
-Local time is now:      Fri Jan 17 13:08:57 UTC 2025.
-Universal Time is now:  Fri Jan 17 13:08:57 UTC 2025.
+Local time is now:      Fri Jan 17 13:18:32 UTC 2025.
+Universal Time is now:  Fri Jan 17 13:18:32 UTC 2025.
 Run 'dpkg-reconfigure tzdata' if you wish to change it.
 
 Setting up libfontenc1:armhf (1:1.1.8-1+b2) ...
@@ -1018,7 +1050,11 @@
 Building tag database...
  -> Finished parsing the build-deps
 I: Building the package
-I: Running cd /build/reproducible-path/python-cai-1.0.4/ && 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  > ../python-cai_1.0.4-1_source.changes
+I: user script /srv/workspace/pbuilder/1023/tmp/hooks/A99_set_merged_usr starting
+Not re-configuring usrmerge for unstable
+I: user script /srv/workspace/pbuilder/1023/tmp/hooks/A99_set_merged_usr finished
+hostname: Name or service not known
+I: Running cd /build/reproducible-path/python-cai-1.0.4/ && 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  > ../python-cai_1.0.4-1_source.changes
 dpkg-buildpackage: info: source package python-cai
 dpkg-buildpackage: info: source version 1.0.4-1
 dpkg-buildpackage: info: source distribution unstable
@@ -1050,18 +1086,18 @@
 running build
 running build_py
 creating build/lib/CAI
-copying src/CAI/_version.py -> build/lib/CAI
 copying src/CAI/cli.py -> build/lib/CAI
 copying src/CAI/CAI.py -> build/lib/CAI
+copying src/CAI/_version.py -> build/lib/CAI
 copying src/CAI/__init__.py -> build/lib/CAI
 installing to build/bdist.linux-armv7l/wheel
 running install
 running install_lib
 creating build/bdist.linux-armv7l/wheel
 creating build/bdist.linux-armv7l/wheel/CAI
-copying build/lib/CAI/_version.py -> build/bdist.linux-armv7l/wheel/./CAI
 copying build/lib/CAI/cli.py -> build/bdist.linux-armv7l/wheel/./CAI
 copying build/lib/CAI/CAI.py -> build/bdist.linux-armv7l/wheel/./CAI
+copying build/lib/CAI/_version.py -> build/bdist.linux-armv7l/wheel/./CAI
 copying build/lib/CAI/__init__.py -> build/bdist.linux-armv7l/wheel/./CAI
 running install_egg_info
 running egg_info
@@ -1078,7 +1114,7 @@
 Copying src/CAI.egg-info to build/bdist.linux-armv7l/wheel/./CAI-1.0.4.egg-info
 running install_scripts
 creating build/bdist.linux-armv7l/wheel/CAI-1.0.4.dist-info/WHEEL
-creating '/build/reproducible-path/python-cai-1.0.4/.pybuild/cpython3_3.12_cai/.tmp-qg5g508b/CAI-1.0.4-py3-none-any.whl' and adding 'build/bdist.linux-armv7l/wheel' to it
+creating '/build/reproducible-path/python-cai-1.0.4/.pybuild/cpython3_3.12_cai/.tmp-eqmogm06/CAI-1.0.4-py3-none-any.whl' and adding 'build/bdist.linux-armv7l/wheel' to it
 adding 'CAI/CAI.py'
 adding 'CAI/__init__.py'
 adding 'CAI/_version.py'
@@ -1110,9 +1146,9 @@
 running install_lib
 creating build/bdist.linux-armv7l/wheel
 creating build/bdist.linux-armv7l/wheel/CAI
-copying build/lib/CAI/_version.py -> build/bdist.linux-armv7l/wheel/./CAI
 copying build/lib/CAI/cli.py -> build/bdist.linux-armv7l/wheel/./CAI
 copying build/lib/CAI/CAI.py -> build/bdist.linux-armv7l/wheel/./CAI
+copying build/lib/CAI/_version.py -> build/bdist.linux-armv7l/wheel/./CAI
 copying build/lib/CAI/__init__.py -> build/bdist.linux-armv7l/wheel/./CAI
 running install_egg_info
 running egg_info
@@ -1127,7 +1163,7 @@
 Copying src/CAI.egg-info to build/bdist.linux-armv7l/wheel/./CAI-1.0.4.egg-info
 running install_scripts
 creating build/bdist.linux-armv7l/wheel/CAI-1.0.4.dist-info/WHEEL
-creating '/build/reproducible-path/python-cai-1.0.4/.pybuild/cpython3_3.13_cai/.tmp-2_b3m0m7/CAI-1.0.4-py3-none-any.whl' and adding 'build/bdist.linux-armv7l/wheel' to it
+creating '/build/reproducible-path/python-cai-1.0.4/.pybuild/cpython3_3.13_cai/.tmp-0w_11cqb/CAI-1.0.4-py3-none-any.whl' and adding 'build/bdist.linux-armv7l/wheel' to it
 adding 'CAI/CAI.py'
 adding 'CAI/__init__.py'
 adding 'CAI/_version.py'
@@ -1160,7 +1196,7 @@
     return float(gmean(sequence_weights))
 
 -- Docs: https://docs.pytest.org/en/stable/how-to/capture-warnings.html
-======================== 16 passed, 1 warning in 1.83s =========================
+======================== 16 passed, 1 warning in 1.67s =========================
 I: pybuild base:311: cd /build/reproducible-path/python-cai-1.0.4/.pybuild/cpython3_3.13_cai/build; python3.13 -m pytest tests
 ============================= test session starts ==============================
 platform linux -- Python 3.13.1, pytest-8.3.4, pluggy-1.5.0
@@ -1179,7 +1215,7 @@
     return float(gmean(sequence_weights))
 
 -- Docs: https://docs.pytest.org/en/stable/how-to/capture-warnings.html
-======================== 16 passed, 1 warning in 1.51s =========================
+======================== 16 passed, 1 warning in 1.50s =========================
    create-stamp debian/debhelper-build-stamp
    dh_testroot -O--buildsystem=pybuild
    dh_prep -O--buildsystem=pybuild
@@ -1188,7 +1224,7 @@
 I: pybuild plugin_pyproject:178: Copying package built for python3.13 to destdir
    debian/rules override_dh_installdocs
 make[1]: Entering directory '/build/reproducible-path/python-cai-1.0.4'
-PATH=/build/reproducible-path/python-cai-1.0.4/debian/python3-cai/usr/bin:/usr/sbin:/usr/bin:/sbin:/bin:/usr/games PYTHONPATH=/build/reproducible-path/python-cai-1.0.4/src python3 -m sphinx -N -bhtml docs build/html
+PATH=/build/reproducible-path/python-cai-1.0.4/debian/python3-cai/usr/bin:/usr/sbin:/usr/bin:/sbin:/bin:/usr/games:/i/capture/the/path PYTHONPATH=/build/reproducible-path/python-cai-1.0.4/src python3 -m sphinx -N -bhtml docs build/html
 Running Sphinx v8.1.3
 WARNING: Invalid configuration value found: 'language = None'. Update your configuration to a valid language code. Falling back to 'en' (English).
 loading translations [en]... done
@@ -1197,7 +1233,7 @@
 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 0xf464caf8>: 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 0xb3c9baf8>: 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 5 source files that are out of date
@@ -1272,12 +1308,14 @@
 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/1023/tmp/hooks/B01_cleanup starting
+I: user script /srv/workspace/pbuilder/1023/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/20039 and its subdirectories
-I: Current time: Fri Jan 17 01:13:05 -12 2025
-I: pbuilder-time-stamp: 1737119585
+I: removing directory /srv/workspace/pbuilder/1023 and its subdirectories
+I: Current time: Sat Jan 18 03:22:58 +14 2025
+I: pbuilder-time-stamp: 1737120178