Diff of the two buildlogs:

--
--- b1/build.log	2025-02-18 14:00:57.101647681 +0000
+++ b2/build.log	2025-02-18 14:03:25.622970715 +0000
@@ -1,6 +1,6 @@
 I: pbuilder: network access will be disabled during build
-I: Current time: Mon Mar 23 08:21:16 -12 2026
-I: pbuilder-time-stamp: 1774297276
+I: Current time: Wed Feb 19 04:00:59 +14 2025
+I: pbuilder-time-stamp: 1739887259
 I: Building the build Environment
 I: extracting base tarball [/var/cache/pbuilder/trixie-reproducible-base.tgz]
 I: copying local configuration
@@ -27,54 +27,86 @@
 dpkg-source: info: applying Remove-mermaid-integration-from-documentation-because-of-.patch
 I: Not using root during the build.
 I: Installing the build-deps
-I: user script /srv/workspace/pbuilder/63579/tmp/hooks/D02_print_environment starting
+I: user script /srv/workspace/pbuilder/19818/tmp/hooks/D01_modify_environment starting
+debug: Running on ionos12-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 18 14:01 /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/19818/tmp/hooks/D01_modify_environment finished
+I: user script /srv/workspace/pbuilder/19818/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=22 '
-  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=10 '
+  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='75476a1976134b95ab7cd34df8830f17'
-  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='63579'
-  PS1='# '
-  PS2='> '
+  INVOCATION_ID=3879b4c388744788b5f3e2ee5dab48ee
+  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=19818
   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.TwSg0Gmd/pbuilderrc_HhsG --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.TwSg0Gmd/b1 --logfile b1/build.log python-structlog_25.1.0-1.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://213.165.73.152:3128'
+  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.TwSg0Gmd/pbuilderrc_Nzv2 --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.TwSg0Gmd/b2 --logfile b2/build.log python-structlog_25.1.0-1.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://46.16.76.132:3128
 I: uname -a
-  Linux ionos6-i386 6.1.0-31-amd64 #1 SMP PREEMPT_DYNAMIC Debian 6.1.128-1 (2025-02-07) x86_64 GNU/Linux
+  Linux i-capture-the-hostname 6.1.0-31-amd64 #1 SMP PREEMPT_DYNAMIC Debian 6.1.128-1 (2025-02-07) x86_64 GNU/Linux
 I: ls -l /bin
-  lrwxrwxrwx 1 root root 7 Nov 22  2024 /bin -> usr/bin
-I: user script /srv/workspace/pbuilder/63579/tmp/hooks/D02_print_environment finished
+  lrwxrwxrwx 1 root root 7 Nov 22 14:40 /bin -> usr/bin
+I: user script /srv/workspace/pbuilder/19818/tmp/hooks/D02_print_environment finished
  -> Attempting to satisfy build-dependencies
  -> Creating pbuilder-satisfydepends-dummy package
 Package: pbuilder-satisfydepends-dummy
@@ -299,7 +331,7 @@
 Get: 147 http://deb.debian.org/debian trixie/main i386 python3-sphinxext-opengraph all 0.7.5-1 [9024 B]
 Get: 148 http://deb.debian.org/debian trixie/main i386 python3-zope.interface i386 7.2-1 [152 kB]
 Get: 149 http://deb.debian.org/debian trixie/main i386 python3-twisted all 24.11.0-1 [2047 kB]
-Fetched 67.6 MB in 4s (17.4 MB/s)
+Fetched 67.6 MB in 2s (41.4 MB/s)
 Preconfiguring packages ...
 Selecting previously unselected package libpython3.13-minimal: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 ... 19795 files and directories currently installed.)
@@ -783,8 +815,8 @@
 Setting up tzdata (2024b-6) ...
 
 Current default time zone: 'Etc/UTC'
-Local time is now:      Mon Mar 23 20:21:45 UTC 2026.
-Universal Time is now:  Mon Mar 23 20:21:45 UTC 2026.
+Local time is now:      Tue Feb 18 14:01:34 UTC 2025.
+Universal Time is now:  Tue Feb 18 14:01:34 UTC 2025.
 Run 'dpkg-reconfigure tzdata' if you wish to change it.
 
 Setting up autotools-dev (20220109.1) ...
@@ -934,7 +966,11 @@
 Building tag database...
  -> Finished parsing the build-deps
 I: Building the package
-I: Running cd /build/reproducible-path/python-structlog-25.1.0/ && 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  > ../python-structlog_25.1.0-1_source.changes
+I: user script /srv/workspace/pbuilder/19818/tmp/hooks/A99_set_merged_usr starting
+Not re-configuring usrmerge for trixie
+I: user script /srv/workspace/pbuilder/19818/tmp/hooks/A99_set_merged_usr finished
+hostname: Name or service not known
+I: Running cd /build/reproducible-path/python-structlog-25.1.0/ && 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  > ../python-structlog_25.1.0-1_source.changes
 dpkg-buildpackage: info: source package python-structlog
 dpkg-buildpackage: info: source version 25.1.0-1
 dpkg-buildpackage: info: source distribution unstable
@@ -981,11 +1017,11 @@
 loading translations [en]... done
 making output directory... done
 Converting `source_suffix = ['.rst', '.md']` to `source_suffix = {'.rst': 'restructuredtext', '.md': 'restructuredtext'}`.
-myst v4.0.0: MdParserConfig(commonmark_only=False, gfm_only=False, enable_extensions={'deflist', 'colon_fence', 'smartquotes'}, disable_syntax=[], all_links_external=False, links_external_new_tab=False, url_schemes=('http', 'https', 'mailto', 'ftp'), ref_domains=None, fence_as_directive=set(), number_code_blocks=[], title_to_header=False, heading_anchors=0, heading_slug_func=None, html_meta={}, footnote_sort=True, footnote_transition=True, words_per_minute=200, substitutions={}, linkify_fuzzy_links=True, dmath_allow_labels=True, dmath_allow_space=True, dmath_allow_digits=True, dmath_double_inline=False, update_mathjax=True, mathjax_classes='tex2jax_process|mathjax_process|math|output_area', enable_checkboxes=False, suppress_warnings=[], highlight_code_blocks=True)
+myst v4.0.0: MdParserConfig(commonmark_only=False, gfm_only=False, enable_extensions={'smartquotes', 'colon_fence', 'deflist'}, disable_syntax=[], all_links_external=False, links_external_new_tab=False, url_schemes=('http', 'https', 'mailto', 'ftp'), ref_domains=None, fence_as_directive=set(), number_code_blocks=[], title_to_header=False, heading_anchors=0, heading_slug_func=None, html_meta={}, footnote_sort=True, footnote_transition=True, words_per_minute=200, substitutions={}, linkify_fuzzy_links=True, dmath_allow_labels=True, dmath_allow_space=True, dmath_allow_digits=True, dmath_double_inline=False, update_mathjax=True, mathjax_classes='tex2jax_process|mathjax_process|math|output_area', enable_checkboxes=False, suppress_warnings=[], highlight_code_blocks=True)
 loading intersphinx inventory 'python' from /usr/share/doc/python3-doc/html/objects.inv ...
 loading intersphinx inventory 'rich' from https://rich.readthedocs.io/en/stable/objects.inv ...
 WARNING: failed to reach any of the inventories with the following issues:
-intersphinx inventory 'https://rich.readthedocs.io/en/stable/objects.inv' not fetchable due to <class 'requests.exceptions.ProxyError'>: HTTPSConnectionPool(host='rich.readthedocs.io', port=443): Max retries exceeded with url: /en/stable/objects.inv (Caused by ProxyError('Unable to connect to proxy', NewConnectionError('<urllib3.connection.HTTPSConnection object at 0xf598d6a8>: Failed to establish a new connection: [Errno 111] Connection refused')))
+intersphinx inventory 'https://rich.readthedocs.io/en/stable/objects.inv' not fetchable due to <class 'requests.exceptions.ProxyError'>: HTTPSConnectionPool(host='rich.readthedocs.io', port=443): Max retries exceeded with url: /en/stable/objects.inv (Caused by ProxyError('Unable to connect to proxy', NewConnectionError('<urllib3.connection.HTTPSConnection object at 0xf59736a8>: Failed to establish a new connection: [Errno 111] Connection refused')))
 building [mo]: targets for 0 po files that are out of date
 writing output... 
 building [html]: targets for 21 source files that are out of date
@@ -1022,9 +1058,9 @@
 preparing documents... done
 copying assets... 
 copying static files... 
-Writing evaluated template result to /build/reproducible-path/python-structlog-25.1.0/.pybuild/docs/html/_static/basic.css
-Writing evaluated template result to /build/reproducible-path/python-structlog-25.1.0/.pybuild/docs/html/_static/documentation_options.js
 Writing evaluated template result to /build/reproducible-path/python-structlog-25.1.0/.pybuild/docs/html/_static/language_data.js
+Writing evaluated template result to /build/reproducible-path/python-structlog-25.1.0/.pybuild/docs/html/_static/documentation_options.js
+Writing evaluated template result to /build/reproducible-path/python-structlog-25.1.0/.pybuild/docs/html/_static/basic.css
 copying static files: done
 copying extra files... 
 copying extra files: done
@@ -1130,7 +1166,7 @@
 SKIPPED [1] tests/test_dev.py:701: Needs better-exceptions.
 SKIPPED [1] tests/test_threadlocal.py:260: Needs greenlet.
 SKIPPED [9] tests/test_tracebacks.py:112: rich not installed
-======================= 847 passed, 28 skipped in 6.30s ========================
+======================= 847 passed, 28 skipped in 5.27s ========================
 I: pybuild base:311: cd /build/reproducible-path/python-structlog-25.1.0/.pybuild/cpython3_3.13_structlog/build; python3.13 -m pytest tests
 ============================= test session starts ==============================
 platform linux -- Python 3.13.2, pytest-8.3.4, pluggy-1.5.0
@@ -1176,7 +1212,7 @@
 SKIPPED [1] tests/test_dev.py:701: Needs better-exceptions.
 SKIPPED [1] tests/test_threadlocal.py:260: Needs greenlet.
 SKIPPED [9] tests/test_tracebacks.py:112: rich not installed
-======================= 847 passed, 28 skipped in 5.52s ========================
+======================= 847 passed, 28 skipped in 4.35s ========================
    create-stamp debian/debhelper-build-stamp
    dh_testroot -O--buildsystem=pybuild
    dh_prep -O--buildsystem=pybuild
@@ -1212,12 +1248,14 @@
 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/19818/tmp/hooks/B01_cleanup starting
+I: user script /srv/workspace/pbuilder/19818/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/63579 and its subdirectories
-I: Current time: Mon Mar 23 08:23:55 -12 2026
-I: pbuilder-time-stamp: 1774297435
+I: removing directory /srv/workspace/pbuilder/19818 and its subdirectories
+I: Current time: Wed Feb 19 04:03:24 +14 2025
+I: pbuilder-time-stamp: 1739887404