Diff of the two buildlogs:

--
--- b1/build.log	2024-10-27 15:53:29.244639973 +0000
+++ b2/build.log	2024-10-27 15:54:06.155327083 +0000
@@ -1,6 +1,6 @@
 I: pbuilder: network access will be disabled during build
-I: Current time: Sun Oct 27 03:51:41 -12 2024
-I: pbuilder-time-stamp: 1730044301
+I: Current time: Sun Nov 30 12:16:31 +14 2025
+I: pbuilder-time-stamp: 1764454591
 I: Building the build Environment
 I: extracting base tarball [/var/cache/pbuilder/unstable-reproducible-base.tgz]
 I: copying local configuration
@@ -27,52 +27,84 @@
 dpkg-source: info: applying 0001-fix-documentation.diff
 I: Not using root during the build.
 I: Installing the build-deps
-I: user script /srv/workspace/pbuilder/298038/tmp/hooks/D02_print_environment starting
+I: user script /srv/workspace/pbuilder/920342/tmp/hooks/D01_modify_environment starting
+debug: Running on ionos15-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 Nov 29 22:16 /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/920342/tmp/hooks/D01_modify_environment finished
+I: user script /srv/workspace/pbuilder/920342/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]="32" [3]="1" [4]="release" [5]="x86_64-pc-linux-gnu")
+  BASH_VERSION='5.2.32(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='ab88a7de316a437e89d1cdd03058e3d7'
-  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='298038'
-  PS1='# '
-  PS2='> '
+  INVOCATION_ID=1889bdeec5bf4ae8b468a9aa6c23ca76
+  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=920342
   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.nSmvUqtT/pbuilderrc_XN2j --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.nSmvUqtT/b1 --logfile b1/build.log mocker-el_0.5.0-2.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.nSmvUqtT/pbuilderrc_VFQe --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.nSmvUqtT/b2 --logfile b2/build.log mocker-el_0.5.0-2.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://213.165.73.152:3128
 I: uname -a
-  Linux ionos11-amd64 6.1.0-26-amd64 #1 SMP PREEMPT_DYNAMIC Debian 6.1.112-1 (2024-09-30) x86_64 GNU/Linux
+  Linux i-capture-the-hostname 6.10.11+bpo-amd64 #1 SMP PREEMPT_DYNAMIC Debian 6.10.11-1~bpo12+1 (2024-10-03) x86_64 GNU/Linux
 I: ls -l /bin
-  lrwxrwxrwx 1 root root 7 Aug  4 21:30 /bin -> usr/bin
-I: user script /srv/workspace/pbuilder/298038/tmp/hooks/D02_print_environment finished
+  lrwxrwxrwx 1 root root 7 Aug  4  2024 /bin -> usr/bin
+I: user script /srv/workspace/pbuilder/920342/tmp/hooks/D02_print_environment finished
  -> Attempting to satisfy build-dependencies
  -> Creating pbuilder-satisfydepends-dummy package
 Package: pbuilder-satisfydepends-dummy
@@ -200,7 +232,7 @@
 Get: 88 http://deb.debian.org/debian unstable/main amd64 libtext-glob-perl all 0.11-3 [7676 B]
 Get: 89 http://deb.debian.org/debian unstable/main amd64 libfile-find-rule-perl all 0.34-3 [26.6 kB]
 Get: 90 http://deb.debian.org/debian unstable/main amd64 dh-elpa all 2.1.5 [29.7 kB]
-Fetched 76.1 MB in 6s (13.2 MB/s)
+Fetched 76.1 MB in 2s (35.8 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 ... 19947 files and directories currently installed.)
@@ -592,7 +624,11 @@
 Building tag database...
  -> Finished parsing the build-deps
 I: Building the package
-I: Running cd /build/reproducible-path/mocker-el-0.5.0/ && 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  > ../mocker-el_0.5.0-2_source.changes
+I: user script /srv/workspace/pbuilder/920342/tmp/hooks/A99_set_merged_usr starting
+Not re-configuring usrmerge for unstable
+I: user script /srv/workspace/pbuilder/920342/tmp/hooks/A99_set_merged_usr finished
+hostname: Name or service not known
+I: Running cd /build/reproducible-path/mocker-el-0.5.0/ && 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  > ../mocker-el_0.5.0-2_source.changes
 dpkg-buildpackage: info: source package mocker-el
 dpkg-buildpackage: info: source version 0.5.0-2
 dpkg-buildpackage: info: source distribution unstable
@@ -617,38 +653,38 @@
 make[1]: Leaving directory '/build/reproducible-path/mocker-el-0.5.0'
    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 test -l test/mocker-test.el --eval \(ert-run-tests-batch-and-exit\)
-Running 29 tests (2024-10-27 15:53:21+0000, selector `t')
-   passed   1/29  mocker-inhibit-mock-not-consumed (0.000467 sec)
-   passed   2/29  mocker-inhibit-mocking (0.000267 sec)
-   passed   3/29  mocker-let-basic (0.000083 sec)
-   passed   4/29  mocker-let-multiple (0.000282 sec)
-   passed   5/29  mocker-let-multiple-calls-exact (0.000335 sec)
-   passed   6/29  mocker-let-multiple-calls-illimited (0.000298 sec)
-   passed   7/29  mocker-let-multiple-calls-min (0.000253 sec)
-   passed   8/29  mocker-let-multiple-calls-multiple-records (0.000396 sec)
-   passed   9/29  mocker-let-multiple-calls-multiple-same-records (0.000337 sec)
-   passed  10/29  mocker-let-multiple-calls-unexpected (0.000281 sec)
-   passed  11/29  mocker-let-multiple-calls-unexpected-exact (0.000251 sec)
-   passed  12/29  mocker-let-multiple-calls-unordered (0.000431 sec)
-   passed  13/29  mocker-let-multiple-inputs (0.000243 sec)
-   passed  14/29  mocker-let-multiple-inputs-invalid (0.000246 sec)
-   passed  15/29  mocker-let-multiple-output-generator (0.000226 sec)
-   passed  16/29  mocker-let-nested (0.000215 sec)
-   passed  17/29  mocker-let-no-record (0.000108 sec)
-   passed  18/29  mocker-let-single (0.000209 sec)
-   passed  19/29  mocker-let-single-implicit-records (0.000104 sec)
-   passed  20/29  mocker-let-single-input-matcher (0.000167 sec)
-   passed  21/29  mocker-let-single-input-matcher-invalid (0.000201 sec)
-   passed  22/29  mocker-let-stub-limited (0.000350 sec)
-   passed  23/29  mocker-let-stub-simple (0.000235 sec)
-   passed  24/29  mocker-let-stub-simple-explicit (0.000246 sec)
-   passed  25/29  mocker-passthrough-basic (0.000318 sec)
-   passed  26/29  mocker-passthrough-mixed (0.000304 sec)
-   passed  27/29  mocker-passthrough-mixed-error (0.000290 sec)
-   passed  28/29  mocker-passthrough-multiple (0.000349 sec)
-   passed  29/29  mocker-rest-args (0.000165 sec)
+Running 29 tests (2025-11-29 22:17:02+0000, selector `t')
+   passed   1/29  mocker-inhibit-mock-not-consumed (0.000235 sec)
+   passed   2/29  mocker-inhibit-mocking (0.000179 sec)
+   passed   3/29  mocker-let-basic (0.000065 sec)
+   passed   4/29  mocker-let-multiple (0.000181 sec)
+   passed   5/29  mocker-let-multiple-calls-exact (0.000212 sec)
+   passed   6/29  mocker-let-multiple-calls-illimited (0.000217 sec)
+   passed   7/29  mocker-let-multiple-calls-min (0.000197 sec)
+   passed   8/29  mocker-let-multiple-calls-multiple-records (0.000290 sec)
+   passed   9/29  mocker-let-multiple-calls-multiple-same-records (0.000209 sec)
+   passed  10/29  mocker-let-multiple-calls-unexpected (0.000177 sec)
+   passed  11/29  mocker-let-multiple-calls-unexpected-exact (0.000173 sec)
+   passed  12/29  mocker-let-multiple-calls-unordered (0.000230 sec)
+   passed  13/29  mocker-let-multiple-inputs (0.000218 sec)
+   passed  14/29  mocker-let-multiple-inputs-invalid (0.000200 sec)
+   passed  15/29  mocker-let-multiple-output-generator (0.000221 sec)
+   passed  16/29  mocker-let-nested (0.000208 sec)
+   passed  17/29  mocker-let-no-record (0.000083 sec)
+   passed  18/29  mocker-let-single (0.000161 sec)
+   passed  19/29  mocker-let-single-implicit-records (0.000136 sec)
+   passed  20/29  mocker-let-single-input-matcher (0.000141 sec)
+   passed  21/29  mocker-let-single-input-matcher-invalid (0.000141 sec)
+   passed  22/29  mocker-let-stub-limited (0.000227 sec)
+   passed  23/29  mocker-let-stub-simple (0.000151 sec)
+   passed  24/29  mocker-let-stub-simple-explicit (0.000165 sec)
+   passed  25/29  mocker-passthrough-basic (0.000192 sec)
+   passed  26/29  mocker-passthrough-mixed (0.000201 sec)
+   passed  27/29  mocker-passthrough-mixed-error (0.000230 sec)
+   passed  28/29  mocker-passthrough-multiple (0.000314 sec)
+   passed  29/29  mocker-rest-args (0.000153 sec)
 
-Ran 29 tests, 29 results as expected, 0 unexpected (2024-10-27 15:53:21+0000, 0.013771 sec)
+Ran 29 tests, 29 results as expected, 0 unexpected (2025-11-29 22:17:02+0000, 0.007271 sec)
 
    create-stamp debian/debhelper-build-stamp
    dh_prep
@@ -674,12 +710,14 @@
 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/920342/tmp/hooks/B01_cleanup starting
+I: user script /srv/workspace/pbuilder/920342/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/298038 and its subdirectories
-I: Current time: Sun Oct 27 03:53:28 -12 2024
-I: pbuilder-time-stamp: 1730044408
+I: removing directory /srv/workspace/pbuilder/920342 and its subdirectories
+I: Current time: Sun Nov 30 12:17:05 +14 2025
+I: pbuilder-time-stamp: 1764454625