Diff of the two buildlogs:

--
--- b1/build.log	2025-01-25 12:15:29.080118385 +0000
+++ b2/build.log	2025-01-25 12:18:14.676653882 +0000
@@ -1,6 +1,6 @@
 I: pbuilder: network access will be disabled during build
-I: Current time: Sat Jan 25 00:14:15 -12 2025
-I: pbuilder-time-stamp: 1737807255
+I: Current time: Sat Feb 28 08:38:34 +14 2026
+I: pbuilder-time-stamp: 1772217514
 I: Building the build Environment
 I: extracting base tarball [/var/cache/pbuilder/trixie-reproducible-base.tgz]
 I: copying local configuration
@@ -23,54 +23,86 @@
 dpkg-source: info: unpacking goocalendar_0.8.0-2.debian.tar.xz
 I: Not using root during the build.
 I: Installing the build-deps
-I: user script /srv/workspace/pbuilder/58619/tmp/hooks/D02_print_environment starting
+I: user script /srv/workspace/pbuilder/117453/tmp/hooks/D01_modify_environment starting
+debug: Running on ionos6-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 Feb 27 18:39 /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/117453/tmp/hooks/D01_modify_environment finished
+I: user script /srv/workspace/pbuilder/117453/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='30c955be1732427d80085c08d71e2e58'
-  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='58619'
-  PS1='# '
-  PS2='> '
+  INVOCATION_ID=a1f5831006df4ae196e31321af95a156
+  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=117453
   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.Od9uO9Fb/pbuilderrc_bLtK --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.Od9uO9Fb/b1 --logfile b1/build.log goocalendar_0.8.0-2.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.Od9uO9Fb/pbuilderrc_IMDj --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.Od9uO9Fb/b2 --logfile b2/build.log goocalendar_0.8.0-2.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 6.1.0-30-amd64 #1 SMP PREEMPT_DYNAMIC Debian 6.1.124-1 (2025-01-12) x86_64 GNU/Linux
+  Linux i-capture-the-hostname 6.1.0-30-amd64 #1 SMP PREEMPT_DYNAMIC Debian 6.1.124-1 (2025-01-12) 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/58619/tmp/hooks/D02_print_environment finished
+  lrwxrwxrwx 1 root root 7 Nov 22  2024 /bin -> usr/bin
+I: user script /srv/workspace/pbuilder/117453/tmp/hooks/D02_print_environment finished
  -> Attempting to satisfy build-dependencies
  -> Creating pbuilder-satisfydepends-dummy package
 Package: pbuilder-satisfydepends-dummy
@@ -322,7 +354,7 @@
 Get: 200 http://deb.debian.org/debian trixie/main i386 python3-snowballstemmer all 2.2.0-4 [58.0 kB]
 Get: 201 http://deb.debian.org/debian trixie/main i386 sphinx-common all 8.1.3-4 [616 kB]
 Get: 202 http://deb.debian.org/debian trixie/main i386 python3-sphinx all 8.1.3-4 [468 kB]
-Fetched 74.1 MB in 1s (62.0 MB/s)
+Fetched 74.1 MB in 2s (37.1 MB/s)
 Preconfiguring packages ...
 Selecting previously unselected package libapparmor1:i386.
 (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 ... 19842 files and directories currently installed.)
@@ -995,8 +1027,8 @@
 Setting up tzdata (2024b-6) ...
 
 Current default time zone: 'Etc/UTC'
-Local time is now:      Sat Jan 25 12:14:52 UTC 2025.
-Universal Time is now:  Sat Jan 25 12:14:52 UTC 2025.
+Local time is now:      Fri Feb 27 18:39:57 UTC 2026.
+Universal Time is now:  Fri Feb 27 18:39:57 UTC 2026.
 Run 'dpkg-reconfigure tzdata' if you wish to change it.
 
 Setting up libgoocanvas-2.0-common (2.0.4-1.1) ...
@@ -1187,7 +1219,11 @@
 Building tag database...
  -> Finished parsing the build-deps
 I: Building the package
-I: Running cd /build/reproducible-path/goocalendar-0.8.0/ && 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  > ../goocalendar_0.8.0-2_source.changes
+I: user script /srv/workspace/pbuilder/117453/tmp/hooks/A99_set_merged_usr starting
+Not re-configuring usrmerge for trixie
+I: user script /srv/workspace/pbuilder/117453/tmp/hooks/A99_set_merged_usr finished
+hostname: Name or service not known
+I: Running cd /build/reproducible-path/goocalendar-0.8.0/ && 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  > ../goocalendar_0.8.0-2_source.changes
 dpkg-buildpackage: info: source package goocalendar
 dpkg-buildpackage: info: source version 0.8.0-2
 dpkg-buildpackage: info: source distribution unstable
@@ -1225,10 +1261,10 @@
 running build
 running build_py
 creating /build/reproducible-path/goocalendar-0.8.0/.pybuild/cpython3_3.12_goocalendar/build/goocalendar
-copying goocalendar/_calendar.py -> /build/reproducible-path/goocalendar-0.8.0/.pybuild/cpython3_3.12_goocalendar/build/goocalendar
 copying goocalendar/_event.py -> /build/reproducible-path/goocalendar-0.8.0/.pybuild/cpython3_3.12_goocalendar/build/goocalendar
 copying goocalendar/util.py -> /build/reproducible-path/goocalendar-0.8.0/.pybuild/cpython3_3.12_goocalendar/build/goocalendar
 copying goocalendar/__init__.py -> /build/reproducible-path/goocalendar-0.8.0/.pybuild/cpython3_3.12_goocalendar/build/goocalendar
+copying goocalendar/_calendar.py -> /build/reproducible-path/goocalendar-0.8.0/.pybuild/cpython3_3.12_goocalendar/build/goocalendar
 sphinx-build doc build/html
 Running Sphinx v8.1.3
 loading translations [en]... done
@@ -1236,7 +1272,7 @@
 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 0xf5eba768>: 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 0xf5f0c768>: 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 1 source files that are out of date
@@ -1249,8 +1285,8 @@
 preparing documents... done
 copying assets... 
 copying static files... 
-Writing evaluated template result to /build/reproducible-path/goocalendar-0.8.0/build/html/_static/documentation_options.js
 Writing evaluated template result to /build/reproducible-path/goocalendar-0.8.0/build/html/_static/basic.css
+Writing evaluated template result to /build/reproducible-path/goocalendar-0.8.0/build/html/_static/documentation_options.js
 Writing evaluated template result to /build/reproducible-path/goocalendar-0.8.0/build/html/_static/language_data.js
 Writing evaluated template result to /build/reproducible-path/goocalendar-0.8.0/build/html/_static/classic.css
 Writing evaluated template result to /build/reproducible-path/goocalendar-0.8.0/build/html/_static/sidebar.js
@@ -1299,19 +1335,19 @@
 running install_lib
 creating /build/reproducible-path/goocalendar-0.8.0/debian/python3-goocalendar/usr/lib/python3.12/dist-packages
 creating /build/reproducible-path/goocalendar-0.8.0/debian/python3-goocalendar/usr/lib/python3.12/dist-packages/goocalendar
+copying /build/reproducible-path/goocalendar-0.8.0/.pybuild/cpython3_3.12_goocalendar/build/goocalendar/_event.py -> /build/reproducible-path/goocalendar-0.8.0/debian/python3-goocalendar/usr/lib/python3.12/dist-packages/goocalendar
+copying /build/reproducible-path/goocalendar-0.8.0/.pybuild/cpython3_3.12_goocalendar/build/goocalendar/util.py -> /build/reproducible-path/goocalendar-0.8.0/debian/python3-goocalendar/usr/lib/python3.12/dist-packages/goocalendar
 creating /build/reproducible-path/goocalendar-0.8.0/debian/python3-goocalendar/usr/lib/python3.12/dist-packages/goocalendar/__pycache__
+copying /build/reproducible-path/goocalendar-0.8.0/.pybuild/cpython3_3.12_goocalendar/build/goocalendar/__pycache__/util.cpython-312.pyc -> /build/reproducible-path/goocalendar-0.8.0/debian/python3-goocalendar/usr/lib/python3.12/dist-packages/goocalendar/__pycache__
 copying /build/reproducible-path/goocalendar-0.8.0/.pybuild/cpython3_3.12_goocalendar/build/goocalendar/__pycache__/__init__.cpython-312.pyc -> /build/reproducible-path/goocalendar-0.8.0/debian/python3-goocalendar/usr/lib/python3.12/dist-packages/goocalendar/__pycache__
 copying /build/reproducible-path/goocalendar-0.8.0/.pybuild/cpython3_3.12_goocalendar/build/goocalendar/__pycache__/_event.cpython-312.pyc -> /build/reproducible-path/goocalendar-0.8.0/debian/python3-goocalendar/usr/lib/python3.12/dist-packages/goocalendar/__pycache__
 copying /build/reproducible-path/goocalendar-0.8.0/.pybuild/cpython3_3.12_goocalendar/build/goocalendar/__pycache__/_calendar.cpython-312.pyc -> /build/reproducible-path/goocalendar-0.8.0/debian/python3-goocalendar/usr/lib/python3.12/dist-packages/goocalendar/__pycache__
-copying /build/reproducible-path/goocalendar-0.8.0/.pybuild/cpython3_3.12_goocalendar/build/goocalendar/__pycache__/util.cpython-312.pyc -> /build/reproducible-path/goocalendar-0.8.0/debian/python3-goocalendar/usr/lib/python3.12/dist-packages/goocalendar/__pycache__
-copying /build/reproducible-path/goocalendar-0.8.0/.pybuild/cpython3_3.12_goocalendar/build/goocalendar/_calendar.py -> /build/reproducible-path/goocalendar-0.8.0/debian/python3-goocalendar/usr/lib/python3.12/dist-packages/goocalendar
-copying /build/reproducible-path/goocalendar-0.8.0/.pybuild/cpython3_3.12_goocalendar/build/goocalendar/_event.py -> /build/reproducible-path/goocalendar-0.8.0/debian/python3-goocalendar/usr/lib/python3.12/dist-packages/goocalendar
-copying /build/reproducible-path/goocalendar-0.8.0/.pybuild/cpython3_3.12_goocalendar/build/goocalendar/util.py -> /build/reproducible-path/goocalendar-0.8.0/debian/python3-goocalendar/usr/lib/python3.12/dist-packages/goocalendar
 copying /build/reproducible-path/goocalendar-0.8.0/.pybuild/cpython3_3.12_goocalendar/build/goocalendar/__init__.py -> /build/reproducible-path/goocalendar-0.8.0/debian/python3-goocalendar/usr/lib/python3.12/dist-packages/goocalendar
-byte-compiling /build/reproducible-path/goocalendar-0.8.0/debian/python3-goocalendar/usr/lib/python3.12/dist-packages/goocalendar/_calendar.py to _calendar.cpython-312.pyc
+copying /build/reproducible-path/goocalendar-0.8.0/.pybuild/cpython3_3.12_goocalendar/build/goocalendar/_calendar.py -> /build/reproducible-path/goocalendar-0.8.0/debian/python3-goocalendar/usr/lib/python3.12/dist-packages/goocalendar
 byte-compiling /build/reproducible-path/goocalendar-0.8.0/debian/python3-goocalendar/usr/lib/python3.12/dist-packages/goocalendar/_event.py to _event.cpython-312.pyc
 byte-compiling /build/reproducible-path/goocalendar-0.8.0/debian/python3-goocalendar/usr/lib/python3.12/dist-packages/goocalendar/util.py to util.cpython-312.pyc
 byte-compiling /build/reproducible-path/goocalendar-0.8.0/debian/python3-goocalendar/usr/lib/python3.12/dist-packages/goocalendar/__init__.py to __init__.cpython-312.pyc
+byte-compiling /build/reproducible-path/goocalendar-0.8.0/debian/python3-goocalendar/usr/lib/python3.12/dist-packages/goocalendar/_calendar.py to _calendar.cpython-312.pyc
 running install_egg_info
 running egg_info
 creating GooCalendar.egg-info
@@ -1352,12 +1388,14 @@
 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/117453/tmp/hooks/B01_cleanup starting
+I: user script /srv/workspace/pbuilder/117453/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/58619 and its subdirectories
-I: Current time: Sat Jan 25 00:15:28 -12 2025
-I: pbuilder-time-stamp: 1737807328
+I: removing directory /srv/workspace/pbuilder/117453 and its subdirectories
+I: Current time: Sat Feb 28 08:41:11 +14 2026
+I: pbuilder-time-stamp: 1772217671