Diff of the two buildlogs:

--
--- b1/build.log	2024-05-25 22:50:36.298070786 +0000
+++ b2/build.log	2024-05-25 22:52:01.538448452 +0000
@@ -1,6 +1,6 @@
 I: pbuilder: network access will be disabled during build
-I: Current time: Sat May 25 10:48:29 -12 2024
-I: pbuilder-time-stamp: 1716677309
+I: Current time: Sat Jun 28 19:13:38 +14 2025
+I: pbuilder-time-stamp: 1751087618
 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 markdown-toc-el_0.1.5-3.debian.tar.xz
 I: Not using root during the build.
 I: Installing the build-deps
-I: user script /srv/workspace/pbuilder/928043/tmp/hooks/D02_print_environment starting
+I: user script /srv/workspace/pbuilder/3989369/tmp/hooks/D01_modify_environment starting
+debug: Running on ionos5-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 Jun 28 05:13 /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/3989369/tmp/hooks/D01_modify_environment finished
+I: user script /srv/workspace/pbuilder/3989369/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=20 '
-  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=42 '
+  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='18781f80ffd74694a1924f1df3d4148d'
-  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='928043'
-  PS1='# '
-  PS2='> '
+  INVOCATION_ID=d40c52d8e0294a25a6c2113fe37bcab2
+  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=3989369
   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.j0573XAH/pbuilderrc_AWp2 --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.j0573XAH/b1 --logfile b1/build.log markdown-toc-el_0.1.5-3.dsc'
-  SUDO_GID='111'
-  SUDO_UID='106'
-  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.j0573XAH/pbuilderrc_KRMo --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.j0573XAH/b2 --logfile b2/build.log markdown-toc-el_0.1.5-3.dsc'
+  SUDO_GID=110
+  SUDO_UID=105
+  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 ionos11-amd64 6.1.0-21-amd64 #1 SMP PREEMPT_DYNAMIC Debian 6.1.90-1 (2024-05-03) x86_64 GNU/Linux
+  Linux i-capture-the-hostname 6.7.12+bpo-amd64 #1 SMP PREEMPT_DYNAMIC Debian 6.7.12-1~bpo12+1 (2024-05-06) x86_64 GNU/Linux
 I: ls -l /bin
-  lrwxrwxrwx 1 root root 7 May 25 07:42 /bin -> usr/bin
-I: user script /srv/workspace/pbuilder/928043/tmp/hooks/D02_print_environment finished
+  lrwxrwxrwx 1 root root 7 Jun 27 14:06 /bin -> usr/bin
+I: user script /srv/workspace/pbuilder/3989369/tmp/hooks/D02_print_environment finished
  -> Attempting to satisfy build-dependencies
  -> Creating pbuilder-satisfydepends-dummy package
 Package: pbuilder-satisfydepends-dummy
@@ -215,7 +247,7 @@
 Get: 95 http://deb.debian.org/debian unstable/main amd64 elpa-markdown-mode all 2.6-1 [127 kB]
 Get: 96 http://deb.debian.org/debian unstable/main amd64 elpa-mocker all 0.5.0-1 [9064 B]
 Get: 97 http://deb.debian.org/debian unstable/main amd64 elpa-s all 1.13.0-1 [17.5 kB]
-Fetched 82.7 MB in 8s (10000 kB/s)
+Fetched 82.7 MB in 2s (37.5 MB/s)
 debconf: delaying package configuration, since apt-utils is not installed
 Selecting previously unselected package install-info.
 (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.)
@@ -618,12 +650,6 @@
 update-alternatives: using /usr/bin/emacsclient.emacs to provide /usr/bin/emacsclient (emacsclient) in auto mode
 Install emacsen-common for emacs
 emacsen-common: Handling install of emacsen flavor emacs
-Install elpa-mocker for emacs
-install/mocker-0.5.0: Handling install of emacsen flavor emacs
-install/mocker-0.5.0: byte-compiling for emacs
-Install elpa-s for emacs
-install/s-1.13.0: Handling install of emacsen flavor emacs
-install/s-1.13.0: byte-compiling for emacs
 Install elpa-markdown-mode for emacs
 install/markdown-mode-2.6: Handling install of emacsen flavor emacs
 install/markdown-mode-2.6: byte-compiling for emacs
@@ -633,6 +659,12 @@
 Install elpa-dash for emacs
 install/dash-2.19.1: Handling install of emacsen flavor emacs
 install/dash-2.19.1: byte-compiling for emacs
+Install elpa-mocker for emacs
+install/mocker-0.5.0: Handling install of emacsen flavor emacs
+install/mocker-0.5.0: byte-compiling for emacs
+Install elpa-s for emacs
+install/s-1.13.0: Handling install of emacsen flavor emacs
+install/s-1.13.0: byte-compiling for emacs
 Setting up dh-elpa (2.0.17) ...
 Processing triggers for libc-bin (2.38-11) ...
 Processing triggers for install-info (7.1-3+b1) ...
@@ -650,7 +682,11 @@
 Building tag database...
  -> Finished parsing the build-deps
 I: Building the package
-I: Running cd /build/reproducible-path/markdown-toc-el-0.1.5/ && 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  > ../markdown-toc-el_0.1.5-3_source.changes
+I: user script /srv/workspace/pbuilder/3989369/tmp/hooks/A99_set_merged_usr starting
+Not re-configuring usrmerge for unstable
+I: user script /srv/workspace/pbuilder/3989369/tmp/hooks/A99_set_merged_usr finished
+hostname: Name or service not known
+I: Running cd /build/reproducible-path/markdown-toc-el-0.1.5/ && 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  > ../markdown-toc-el_0.1.5-3_source.changes
 dpkg-buildpackage: info: source package markdown-toc-el
 dpkg-buildpackage: info: source version 0.1.5-3
 dpkg-buildpackage: info: source distribution unstable
@@ -672,37 +708,37 @@
    dh_elpa_test
 	emacs -batch -Q -l package --eval "(add-to-list 'package-directory-list \"/usr/share/emacs/site-lisp/elpa\")" --eval "(add-to-list 'package-directory-list \"/usr/share/emacs/site-lisp/elpa-src\")" -f package-initialize -L . -L test -l test/markdown-toc-test.el --eval \(ert-run-tests-batch-and-exit\)
 Package cl is deprecated
-Running 25 tests (2024-05-25 22:50:18+0000, selector `t')
-   passed   1/25  markdown-toc--compute-full-toc (0.000157 sec)
-   passed   2/25  markdown-toc--compute-toc-structure (0.000127 sec)
-   passed   3/25  markdown-toc--compute-toc-structure-from-level (0.000105 sec)
-   passed   4/25  markdown-toc--read-title-out-of-link (0.000137 sec)
-   passed   5/25  markdown-toc--symbol (0.000075 sec)
-   passed   6/25  markdown-toc--title-level (0.000187 sec)
-   passed   7/25  markdown-toc--to-link (0.000215 sec)
-   passed   8/25  markdown-toc--to-markdown-toc (0.000607 sec)
-   passed   9/25  markdown-toc-follow-link-at-point (0.000161 sec)
+Running 25 tests (2025-06-28 05:14:55+0000, selector `t')
+   passed   1/25  markdown-toc--compute-full-toc (0.000152 sec)
+   passed   2/25  markdown-toc--compute-toc-structure (0.000156 sec)
+   passed   3/25  markdown-toc--compute-toc-structure-from-level (0.000133 sec)
+   passed   4/25  markdown-toc--read-title-out-of-link (0.000136 sec)
+   passed   5/25  markdown-toc--symbol (0.000090 sec)
+   passed   6/25  markdown-toc--title-level (0.000200 sec)
+   passed   7/25  markdown-toc--to-link (0.000222 sec)
+   passed   8/25  markdown-toc--to-markdown-toc (0.000531 sec)
+   passed   9/25  markdown-toc-follow-link-at-point (0.000190 sec)
 markdown-toc: Not on a link (or misindented), nothing to do
 markdown-toc: Not on a link (or misindented), nothing to do
-   passed  10/25  markdown-toc-follow-link-at-point-failures (0.000286 sec)
-   passed  11/25  markdown-toc-generate-toc--first-toc (0.001578 sec)
-   passed  12/25  markdown-toc-generate-toc--first-toc-with-user-override (0.001135 sec)
-   passed  13/25  markdown-toc-generate-toc--replace-old-toc (0.001260 sec)
-   passed  14/25  markdown-toc-generate-toc--replace-old-toc-if-already-present (0.001200 sec)
-   passed  15/25  markdown-toc-generate-toc--with-customs (0.000483 sec)
-   passed  16/25  markdown-toc-generate-toc--with-duplicate-titles (0.001602 sec)
-   passed  17/25  test-markdown-toc--bug-report (0.000464 sec)
-   passed  18/25  test-markdown-toc--refresh-toc--with-existing-toc (0.001253 sec)
-   passed  19/25  test-markdown-toc-bug-report (0.000392 sec)
-   passed  20/25  test-markdown-toc-delete-toc (0.000312 sec)
-   passed  21/25  test-markdown-toc-generate-or-refresh-toc--with-existing-toc (0.001225 sec)
-   passed  22/25  test-markdown-toc-generate-or-refresh-toc--without-existing-toc (0.001342 sec)
-   passed  23/25  test-markdown-toc-log-msg (1.045012 sec)
-   passed  24/25  test-markdown-toc-refresh-toc--without-existing-toc (0.000462 sec)
+   passed  10/25  markdown-toc-follow-link-at-point-failures (0.000299 sec)
+   passed  11/25  markdown-toc-generate-toc--first-toc (0.001070 sec)
+   passed  12/25  markdown-toc-generate-toc--first-toc-with-user-override (0.000786 sec)
+   passed  13/25  markdown-toc-generate-toc--replace-old-toc (0.000835 sec)
+   passed  14/25  markdown-toc-generate-toc--replace-old-toc-if-already-present (0.000846 sec)
+   passed  15/25  markdown-toc-generate-toc--with-customs (0.000431 sec)
+   passed  16/25  markdown-toc-generate-toc--with-duplicate-titles (0.001047 sec)
+   passed  17/25  test-markdown-toc--bug-report (0.000366 sec)
+   passed  18/25  test-markdown-toc--refresh-toc--with-existing-toc (0.000839 sec)
+   passed  19/25  test-markdown-toc-bug-report (0.000327 sec)
+   passed  20/25  test-markdown-toc-delete-toc (0.000301 sec)
+   passed  21/25  test-markdown-toc-generate-or-refresh-toc--with-existing-toc (0.000848 sec)
+   passed  22/25  test-markdown-toc-generate-or-refresh-toc--without-existing-toc (0.000924 sec)
+   passed  23/25  test-markdown-toc-log-msg (0.250170 sec)
+   passed  24/25  test-markdown-toc-refresh-toc--without-existing-toc (0.000455 sec)
 markdown-toc version: 0.1.2
-   passed  25/25  test-markdown-toc-version (0.000090 sec)
+   passed  25/25  test-markdown-toc-version (0.000141 sec)
 
-Ran 25 tests, 25 results as expected, 0 unexpected (2024-05-25 22:50:19+0000, 1.062660 sec)
+Ran 25 tests, 25 results as expected, 0 unexpected (2025-06-28 05:14:56+0000, 0.263225 sec)
 
    create-stamp debian/debhelper-build-stamp
    dh_prep
@@ -731,12 +767,14 @@
 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/3989369/tmp/hooks/B01_cleanup starting
+I: user script /srv/workspace/pbuilder/3989369/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/928043 and its subdirectories
-I: Current time: Sat May 25 10:50:29 -12 2024
-I: pbuilder-time-stamp: 1716677429
+I: removing directory /srv/workspace/pbuilder/3989369 and its subdirectories
+I: Current time: Sat Jun 28 19:14:59 +14 2025
+I: pbuilder-time-stamp: 1751087699