Diff of the two buildlogs:

--
--- b1/build.log	2024-05-26 09:13:02.792091253 +0000
+++ b2/build.log	2024-05-26 09:15:40.749357662 +0000
@@ -1,6 +1,6 @@
 I: pbuilder: network access will be disabled during build
-I: Current time: Sat Jun 28 03:34:43 -12 2025
-I: pbuilder-time-stamp: 1751124883
+I: Current time: Sun May 26 23:13:08 +14 2024
+I: pbuilder-time-stamp: 1716714788
 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: unpacking linkchecker_10.4.0-1.debian.tar.xz
 I: using fakeroot in build.
 I: Installing the build-deps
-I: user script /srv/workspace/pbuilder/1973226/tmp/hooks/D02_print_environment starting
+I: user script /srv/workspace/pbuilder/466708/tmp/hooks/D01_modify_environment starting
+debug: Running on ionos11-amd64.
+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 May 26 09:13 /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/466708/tmp/hooks/D01_modify_environment finished
+I: user script /srv/workspace/pbuilder/466708/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='amd64'
-  DEBIAN_FRONTEND='noninteractive'
-  DEB_BUILD_OPTIONS='buildinfo=+all reproducible=+all parallel=42 '
-  DISTRIBUTION='unstable'
-  HOME='/root'
-  HOST_ARCH='amd64'
+  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]="21" [3]="1" [4]="release" [5]="x86_64-pc-linux-gnu")
+  BASH_VERSION='5.2.21(1)-release'
+  BUILDDIR=/build/reproducible-path
+  BUILDUSERGECOS='second user,second room,second work-phone,second home-phone,second other'
+  BUILDUSERNAME=pbuilder2
+  BUILD_ARCH=amd64
+  DEBIAN_FRONTEND=noninteractive
+  DEB_BUILD_OPTIONS='buildinfo=+all reproducible=+all parallel=20 '
+  DIRSTACK=()
+  DISTRIBUTION=unstable
+  EUID=0
+  FUNCNAME=([0]="Echo" [1]="main")
+  GROUPS=()
+  HOME=/root
+  HOSTNAME=i-capture-the-hostname
+  HOSTTYPE=x86_64
+  HOST_ARCH=amd64
   IFS=' 	
   '
-  INVOCATION_ID='70bd26eb328e47c1a432c8ac22ec6978'
-  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='1973226'
-  PS1='# '
-  PS2='> '
+  INVOCATION_ID=f64e6082a0444651a27437b38c7fa48f
+  LANG=C
+  LANGUAGE=et_EE:et
+  LC_ALL=C
+  MACHTYPE=x86_64-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=466708
   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.6WzAvmcx/pbuilderrc_AJL0 --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.6WzAvmcx/b1 --logfile b1/build.log linkchecker_10.4.0-1.dsc'
-  SUDO_GID='110'
-  SUDO_UID='105'
-  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.6WzAvmcx/pbuilderrc_coG9 --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.6WzAvmcx/b2 --logfile b2/build.log linkchecker_10.4.0-1.dsc'
+  SUDO_GID=111
+  SUDO_UID=106
+  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 ionos5-amd64 6.7.12+bpo-amd64 #1 SMP PREEMPT_DYNAMIC Debian 6.7.12-1~bpo12+1 (2024-05-06) x86_64 GNU/Linux
+  Linux i-capture-the-hostname 6.1.0-21-amd64 #1 SMP PREEMPT_DYNAMIC Debian 6.1.90-1 (2024-05-03) x86_64 GNU/Linux
 I: ls -l /bin
-  lrwxrwxrwx 1 root root 7 Jun 27 14:06 /bin -> usr/bin
-I: user script /srv/workspace/pbuilder/1973226/tmp/hooks/D02_print_environment finished
+  lrwxrwxrwx 1 root root 7 May 25 07:42 /bin -> usr/bin
+I: user script /srv/workspace/pbuilder/466708/tmp/hooks/D02_print_environment finished
  -> Attempting to satisfy build-dependencies
  -> Creating pbuilder-satisfydepends-dummy package
 Package: pbuilder-satisfydepends-dummy
@@ -225,7 +257,7 @@
 Get: 91 http://deb.debian.org/debian unstable/main amd64 python3-six all 1.16.0-6 [16.3 kB]
 Get: 92 http://deb.debian.org/debian unstable/main amd64 python3-urllib3 all 1.26.18-2 [116 kB]
 Get: 93 http://deb.debian.org/debian unstable/main amd64 python3-requests all 2.31.0+dfsg-2 [68.7 kB]
-Fetched 51.9 MB in 1s (103 MB/s)
+Fetched 51.9 MB in 1s (47.4 MB/s)
 debconf: delaying package configuration, since apt-utils is not installed
 Selecting previously unselected package libpython3.11-minimal:amd64.
 (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 ... 19718 files and directories currently installed.)
@@ -533,8 +565,8 @@
 Setting up tzdata (2024a-4) ...
 
 Current default time zone: 'Etc/UTC'
-Local time is now:      Sat Jun 28 15:35:17 UTC 2025.
-Universal Time is now:  Sat Jun 28 15:35:17 UTC 2025.
+Local time is now:      Sun May 26 09:14:26 UTC 2024.
+Universal Time is now:  Sun May 26 09:14:26 UTC 2024.
 Run 'dpkg-reconfigure tzdata' if you wish to change it.
 
 Setting up autotools-dev (20220109.1) ...
@@ -637,7 +669,11 @@
 fakeroot is already the newest version (1.34-1).
 0 upgraded, 0 newly installed, 0 to remove and 0 not upgraded.
 I: Building the package
-I: Running cd /build/reproducible-path/linkchecker-10.4.0/ && 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  > ../linkchecker_10.4.0-1_source.changes
+I: user script /srv/workspace/pbuilder/466708/tmp/hooks/A99_set_merged_usr starting
+Not re-configuring usrmerge for unstable
+I: user script /srv/workspace/pbuilder/466708/tmp/hooks/A99_set_merged_usr finished
+hostname: Name or service not known
+I: Running cd /build/reproducible-path/linkchecker-10.4.0/ && 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  > ../linkchecker_10.4.0-1_source.changes
 dpkg-buildpackage: info: source package linkchecker
 dpkg-buildpackage: info: source version 10.4.0-1
 dpkg-buildpackage: info: source distribution unstable
@@ -668,7 +704,7 @@
   --package-name=LinkChecker \
   --from-code=UTF-8 \
   --msgid-bugs-address=https://github.com/linkchecker/linkchecker -o linkchecker.pot \
-  --keyword=_n:1,2 ../linkcheck/containers.py ../linkcheck/i18n.py ../linkcheck/loader.py ../linkcheck/httputil.py ../linkcheck/command/arg_parser.py ../linkcheck/command/__init__.py ../linkcheck/command/setup_config.py ../linkcheck/command/linkchecker.py ../linkcheck/checker/dnsurl.py ../linkcheck/checker/const.py ../linkcheck/checker/unknownurl.py ../linkcheck/checker/fileurl.py ../linkcheck/checker/__init__.py ../linkcheck/checker/internpaturl.py ../linkcheck/checker/urlbase.py ../linkcheck/checker/ignoreurl.py ../linkcheck/checker/mailtourl.py ../linkcheck/checker/ftpurl.py ../linkcheck/checker/httpurl.py ../linkcheck/checker/itmsservicesurl.py ../linkcheck/robotparser2.py ../linkcheck/bookmarks/opera.py ../linkcheck/bookmarks/firefox.py ../linkcheck/bookmarks/chromium.py ../linkcheck/bookmarks/__init__.py ../linkcheck/bookmarks/safari.py ../linkcheck/lc_cgi.py ../linkcheck/better_exchook2.py ../linkcheck/log.py ../linkcheck/lock.py ../linkcheck/trace.py ../linkcheck/parser/sitemap.py ../linkcheck/parser/__init__.py ../linkcheck/colorama.py ../linkcheck/__init__.py ../linkcheck/cache/urlqueue.py ../linkcheck/cache/__init__.py ../linkcheck/cache/robots_txt.py ../linkcheck/cache/results.py ../linkcheck/dummy.py ../linkcheck/memoryutil.py ../linkcheck/network/iputil.py ../linkcheck/network/__init__.py ../linkcheck/fileutil.py ../linkcheck/cookies.py ../linkcheck/cmdline.py ../linkcheck/mimeutil.py ../linkcheck/url.py ../linkcheck/plugins/viruscheck.py ../linkcheck/plugins/httpheaderinfo.py ../linkcheck/plugins/locationinfo.py ../linkcheck/plugins/parseword.py ../linkcheck/plugins/regexcheck.py ../linkcheck/plugins/sslcertcheck.py ../linkcheck/plugins/__init__.py ../linkcheck/plugins/markdowncheck.py ../linkcheck/plugins/anchorcheck.py ../linkcheck/plugins/syntaxchecks.py ../linkcheck/plugins/parsepdf.py ../linkcheck/ftpparse.py ../linkcheck/decorators.py ../linkcheck/logger/xmllog.py ../linkcheck/logger/failures.py ../linkcheck/logger/html.py ../linkcheck/logger/csvlog.py ../linkcheck/logger/gxml.py ../linkcheck/logger/customxml.py ../linkcheck/logger/sql.py ../linkcheck/logger/__init__.py ../linkcheck/logger/text.py ../linkcheck/logger/dot.py ../linkcheck/logger/sitemapxml.py ../linkcheck/logger/graph.py ../linkcheck/logger/none.py ../linkcheck/logger/gml.py ../linkcheck/ansicolor.py ../linkcheck/logconf.py ../linkcheck/threader.py ../linkcheck/socketutil.py ../linkcheck/configuration/__init__.py ../linkcheck/configuration/confparse.py ../linkcheck/strformat.py ../linkcheck/__main__.py ../linkcheck/data/__init__.py ../linkcheck/htmlutil/loginformsearch.py ../linkcheck/htmlutil/__init__.py ../linkcheck/htmlutil/linkparse.py ../linkcheck/htmlutil/srcsetparse.py ../linkcheck/htmlutil/htmlsoup.py ../linkcheck/director/interrupter.py ../linkcheck/director/logger.py ../linkcheck/director/checker.py ../linkcheck/director/console.py ../linkcheck/director/status.py ../linkcheck/director/__init__.py ../linkcheck/director/aggregator.py ../linkcheck/director/task.py /usr/lib/python3.11/argparse.py
+  --keyword=_n:1,2 ../linkcheck/__init__.py ../linkcheck/plugins/locationinfo.py ../linkcheck/plugins/__init__.py ../linkcheck/plugins/syntaxchecks.py ../linkcheck/plugins/regexcheck.py ../linkcheck/plugins/httpheaderinfo.py ../linkcheck/plugins/viruscheck.py ../linkcheck/plugins/anchorcheck.py ../linkcheck/plugins/markdowncheck.py ../linkcheck/plugins/parseword.py ../linkcheck/plugins/sslcertcheck.py ../linkcheck/plugins/parsepdf.py ../linkcheck/lock.py ../linkcheck/checker/__init__.py ../linkcheck/checker/urlbase.py ../linkcheck/checker/internpaturl.py ../linkcheck/checker/fileurl.py ../linkcheck/checker/httpurl.py ../linkcheck/checker/mailtourl.py ../linkcheck/checker/unknownurl.py ../linkcheck/checker/ftpurl.py ../linkcheck/checker/itmsservicesurl.py ../linkcheck/checker/const.py ../linkcheck/checker/dnsurl.py ../linkcheck/checker/ignoreurl.py ../linkcheck/url.py ../linkcheck/trace.py ../linkcheck/fileutil.py ../linkcheck/ftpparse.py ../linkcheck/command/__init__.py ../linkcheck/command/arg_parser.py ../linkcheck/command/linkchecker.py ../linkcheck/command/setup_config.py ../linkcheck/threader.py ../linkcheck/strformat.py ../linkcheck/robotparser2.py ../linkcheck/memoryutil.py ../linkcheck/loader.py ../linkcheck/network/__init__.py ../linkcheck/network/iputil.py ../linkcheck/logger/__init__.py ../linkcheck/logger/none.py ../linkcheck/logger/xmllog.py ../linkcheck/logger/graph.py ../linkcheck/logger/html.py ../linkcheck/logger/gxml.py ../linkcheck/logger/csvlog.py ../linkcheck/logger/gml.py ../linkcheck/logger/sitemapxml.py ../linkcheck/logger/dot.py ../linkcheck/logger/sql.py ../linkcheck/logger/failures.py ../linkcheck/logger/text.py ../linkcheck/logger/customxml.py ../linkcheck/ansicolor.py ../linkcheck/colorama.py ../linkcheck/decorators.py ../linkcheck/socketutil.py ../linkcheck/parser/__init__.py ../linkcheck/parser/sitemap.py ../linkcheck/__main__.py ../linkcheck/i18n.py ../linkcheck/htmlutil/__init__.py ../linkcheck/htmlutil/loginformsearch.py ../linkcheck/htmlutil/srcsetparse.py ../linkcheck/htmlutil/htmlsoup.py ../linkcheck/htmlutil/linkparse.py ../linkcheck/data/__init__.py ../linkcheck/containers.py ../linkcheck/mimeutil.py ../linkcheck/cache/__init__.py ../linkcheck/cache/urlqueue.py ../linkcheck/cache/robots_txt.py ../linkcheck/cache/results.py ../linkcheck/cmdline.py ../linkcheck/bookmarks/__init__.py ../linkcheck/bookmarks/safari.py ../linkcheck/bookmarks/firefox.py ../linkcheck/bookmarks/opera.py ../linkcheck/bookmarks/chromium.py ../linkcheck/better_exchook2.py ../linkcheck/configuration/__init__.py ../linkcheck/configuration/confparse.py ../linkcheck/cookies.py ../linkcheck/httputil.py ../linkcheck/log.py ../linkcheck/logconf.py ../linkcheck/director/__init__.py ../linkcheck/director/checker.py ../linkcheck/director/console.py ../linkcheck/director/task.py ../linkcheck/director/interrupter.py ../linkcheck/director/status.py ../linkcheck/director/aggregator.py ../linkcheck/director/logger.py ../linkcheck/dummy.py ../linkcheck/lc_cgi.py /usr/lib/python3.11/argparse.py
 ../linkcheck/plugins/markdowncheck.py:88: warning: 'msgid' format string with unnamed arguments cannot be properly localized:
                                                    The translator cannot reorder the arguments.
                                                    Please consider using a format string with named arguments,
@@ -686,13 +722,13 @@
                                                       Please consider using a format string with named arguments,
                                                       and a mapping instead of a tuple for the arguments.
 msgmerge -U --suffix=.bak de.po linkchecker.pot
-.............................................................................. done.
+................................................. done.
 msgmerge -U --suffix=.bak es.po linkchecker.pot
-................................................................................................ done.
+.................................................................... done.
 msgmerge -U --suffix=.bak fr.po linkchecker.pot
-............................................................................... done.
+...................................................... done.
 msgmerge -U --suffix=.bak nl_NL.po linkchecker.pot
-......................................................................... done.
+..................................................... done.
 make[3]: Leaving directory '/build/reproducible-path/linkchecker-10.4.0/po'
 make[2]: Leaving directory '/build/reproducible-path/linkchecker-10.4.0'
 dh_auto_configure --buildsystem pybuild
@@ -761,9 +797,9 @@
    dh_shlibdeps -a
    dh_installdeb
    dh_gencontrol
-dpkg-gencontrol: warning: Depends field of package linkchecker-web: substitution variable ${python3:Depends} used, but is not defined
 dpkg-gencontrol: warning: Depends field of package linkchecker: substitution variable ${shlibs:Depends} used, but is not defined
 dpkg-gencontrol: warning: Provides field of package linkchecker: substitution variable ${python3:Provides} used, but is not defined
+dpkg-gencontrol: warning: Depends field of package linkchecker-web: substitution variable ${python3:Depends} used, but is not defined
    dh_md5sums
    dh_builddeb
 dpkg-deb: building package 'linkchecker' in '../linkchecker_10.4.0-1_amd64.deb'.
@@ -776,12 +812,14 @@
 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/466708/tmp/hooks/B01_cleanup starting
+I: user script /srv/workspace/pbuilder/466708/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/1973226 and its subdirectories
-I: Current time: Sat Jun 28 03:36:00 -12 2025
-I: pbuilder-time-stamp: 1751124960
+I: removing directory /srv/workspace/pbuilder/466708 and its subdirectories
+I: Current time: Sun May 26 23:15:40 +14 2024
+I: pbuilder-time-stamp: 1716714940