Diff of the two buildlogs:

--
--- b1/build.log	2025-01-21 13:32:44.666393910 +0000
+++ b2/build.log	2025-01-21 13:33:23.796643267 +0000
@@ -1,6 +1,6 @@
 I: pbuilder: network access will be disabled during build
-I: Current time: Tue Jan 21 01:32:02 -12 2025
-I: pbuilder-time-stamp: 1737466322
+I: Current time: Tue Feb 24 09:55:49 +14 2026
+I: pbuilder-time-stamp: 1771876549
 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 xr-el_2.1+repack-1.debian.tar.xz
 I: Not using root during the build.
 I: Installing the build-deps
-I: user script /srv/workspace/pbuilder/46673/tmp/hooks/D02_print_environment starting
+I: user script /srv/workspace/pbuilder/81716/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 23 19:55 /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/81716/tmp/hooks/D01_modify_environment finished
+I: user script /srv/workspace/pbuilder/81716/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='4d746bbfcfa84eb8809f79f85dfed13a'
-  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='46673'
-  PS1='# '
-  PS2='> '
+  INVOCATION_ID=9493c90ecec2407a9e17c33ceb9d7e47
+  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=81716
   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.I93hXjJl/pbuilderrc_gcJw --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.I93hXjJl/b1 --logfile b1/build.log xr-el_2.1+repack-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://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.I93hXjJl/pbuilderrc_4D3r --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.I93hXjJl/b2 --logfile b2/build.log xr-el_2.1+repack-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://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/46673/tmp/hooks/D02_print_environment finished
+  lrwxrwxrwx 1 root root 7 Nov 22  2024 /bin -> usr/bin
+I: user script /srv/workspace/pbuilder/81716/tmp/hooks/D02_print_environment finished
  -> Attempting to satisfy build-dependencies
  -> Creating pbuilder-satisfydepends-dummy package
 Package: pbuilder-satisfydepends-dummy
@@ -204,7 +236,7 @@
 Get: 94 http://deb.debian.org/debian trixie/main i386 libtext-glob-perl all 0.11-3 [7676 B]
 Get: 95 http://deb.debian.org/debian trixie/main i386 libfile-find-rule-perl all 0.34-3 [26.6 kB]
 Get: 96 http://deb.debian.org/debian trixie/main i386 dh-elpa all 2.1.5 [29.7 kB]
-Fetched 79.9 MB in 1s (69.7 MB/s)
+Fetched 79.9 MB in 3s (29.3 MB/s)
 Preconfiguring packages ...
 Selecting previously unselected package netbase.
 (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.)
@@ -618,7 +650,11 @@
 Building tag database...
  -> Finished parsing the build-deps
 I: Building the package
-I: Running cd /build/reproducible-path/xr-el-2.1+repack/ && 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  > ../xr-el_2.1+repack-1_source.changes
+I: user script /srv/workspace/pbuilder/81716/tmp/hooks/A99_set_merged_usr starting
+Not re-configuring usrmerge for trixie
+I: user script /srv/workspace/pbuilder/81716/tmp/hooks/A99_set_merged_usr finished
+hostname: Name or service not known
+I: Running cd /build/reproducible-path/xr-el-2.1+repack/ && 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  > ../xr-el_2.1+repack-1_source.changes
 dpkg-buildpackage: info: source package xr-el
 dpkg-buildpackage: info: source version 2.1+repack-1
 dpkg-buildpackage: info: source distribution unstable
@@ -634,37 +670,37 @@
    dh_autoreconf
    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\")" --eval "(setq ert-batch-backtrace-right-margin nil)" -f package-initialize -L . -l xr-test.el --eval \(ert-run-tests-batch-and-exit\)
-Running 28 tests (2025-01-21 13:32:39+0000, selector `t')
-   passed   1/28  xr--tristate-all (0.000170 sec)
-   passed   2/28  xr--tristate-some (0.000095 sec)
-   passed   3/28  xr-anything (0.000185 sec)
-   passed   4/28  xr-backref (0.000443 sec)
-   passed   5/28  xr-basic (0.000361 sec)
-   passed   6/28  xr-category (0.000600 sec)
-   passed   7/28  xr-char-classes (0.004089 sec)
-   passed   8/28  xr-dialect (0.001562 sec)
-   passed   9/28  xr-edge-cases (0.001410 sec)
-   passed  10/28  xr-empty (0.000192 sec)
-   passed  11/28  xr-lazy (0.000366 sec)
-   passed  12/28  xr-lint (0.003678 sec)
-   passed  13/28  xr-lint-bad-anchor (0.002033 sec)
-   passed  14/28  xr-lint-branch-subsumption (0.011017 sec)
-   passed  15/28  xr-lint-char-alt (0.002810 sec)
-   passed  16/28  xr-lint-file (0.000382 sec)
-   passed  17/28  xr-lint-noisy (0.002804 sec)
-   passed  18/28  xr-lint-repetition-of-empty (0.001050 sec)
-   passed  19/28  xr-lint-subsumed-repetition (0.007289 sec)
-   passed  20/28  xr-lint-wrapped-subsumption (0.000741 sec)
-   passed  21/28  xr-misc (0.000301 sec)
-   passed  22/28  xr-pretty (0.003025 sec)
-   passed  23/28  xr-real (0.000563 sec)
-   passed  24/28  xr-repeat (0.000873 sec)
-   passed  25/28  xr-simplify (0.000297 sec)
-   passed  26/28  xr-skip-set (0.001633 sec)
-   passed  27/28  xr-skip-set-lint (0.002146 sec)
-   passed  28/28  xr-syntax (0.000442 sec)
+Running 28 tests (2026-02-23 19:56:19+0000, selector `t')
+   passed   1/28  xr--tristate-all (0.000218 sec)
+   passed   2/28  xr--tristate-some (0.000107 sec)
+   passed   3/28  xr-anything (0.000199 sec)
+   passed   4/28  xr-backref (0.000366 sec)
+   passed   5/28  xr-basic (0.000310 sec)
+   passed   6/28  xr-category (0.000474 sec)
+   passed   7/28  xr-char-classes (0.002712 sec)
+   passed   8/28  xr-dialect (0.001248 sec)
+   passed   9/28  xr-edge-cases (0.001100 sec)
+   passed  10/28  xr-empty (0.000179 sec)
+   passed  11/28  xr-lazy (0.000303 sec)
+   passed  12/28  xr-lint (0.002533 sec)
+   passed  13/28  xr-lint-bad-anchor (0.001476 sec)
+   passed  14/28  xr-lint-branch-subsumption (0.007779 sec)
+   passed  15/28  xr-lint-char-alt (0.002196 sec)
+   passed  16/28  xr-lint-file (0.000334 sec)
+   passed  17/28  xr-lint-noisy (0.001863 sec)
+   passed  18/28  xr-lint-repetition-of-empty (0.000755 sec)
+   passed  19/28  xr-lint-subsumed-repetition (0.004463 sec)
+   passed  20/28  xr-lint-wrapped-subsumption (0.000611 sec)
+   passed  21/28  xr-misc (0.000235 sec)
+   passed  22/28  xr-pretty (0.002020 sec)
+   passed  23/28  xr-real (0.000379 sec)
+   passed  24/28  xr-repeat (0.000541 sec)
+   passed  25/28  xr-simplify (0.000248 sec)
+   passed  26/28  xr-skip-set (0.001100 sec)
+   passed  27/28  xr-skip-set-lint (0.001402 sec)
+   passed  28/28  xr-syntax (0.000341 sec)
 
-Ran 28 tests, 28 results as expected, 0 unexpected (2025-01-21 13:32:39+0000, 0.053409 sec)
+Ran 28 tests, 28 results as expected, 0 unexpected (2026-02-23 19:56:19+0000, 0.037531 sec)
 
    create-stamp debian/debhelper-build-stamp
    dh_prep
@@ -690,12 +726,14 @@
 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/81716/tmp/hooks/B01_cleanup starting
+I: user script /srv/workspace/pbuilder/81716/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/46673 and its subdirectories
-I: Current time: Tue Jan 21 01:32:43 -12 2025
-I: pbuilder-time-stamp: 1737466363
+I: removing directory /srv/workspace/pbuilder/81716 and its subdirectories
+I: Current time: Tue Feb 24 09:56:22 +14 2026
+I: pbuilder-time-stamp: 1771876582