Diff of the two buildlogs:

--
--- b1/build.log	2024-05-04 14:52:30.986455524 +0000
+++ b2/build.log	2024-05-04 14:53:26.428092217 +0000
@@ -1,6 +1,6 @@
 I: pbuilder: network access will be disabled during build
-I: Current time: Sat May  4 02:49:27 -12 2024
-I: pbuilder-time-stamp: 1714834167
+I: Current time: Sat Jun  7 11:15:32 +14 2025
+I: pbuilder-time-stamp: 1749244532
 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/3552804/tmp/hooks/D02_print_environment starting
+I: user script /srv/workspace/pbuilder/2009444/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  6 21:15 /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/2009444/tmp/hooks/D01_modify_environment finished
+I: user script /srv/workspace/pbuilder/2009444/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='35239e939a2a412aae3b0917fc1f85fa'
-  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='3552804'
-  PS1='# '
-  PS2='> '
+  INVOCATION_ID=c0d361a3732d4a9a96e561b348902f0f
+  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=2009444
   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.gDb0rbLC/pbuilderrc_TO4D --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.gDb0rbLC/b1 --logfile b1/build.log mocker-el_0.5.0-1.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.gDb0rbLC/pbuilderrc_irg3 --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.gDb0rbLC/b2 --logfile b2/build.log mocker-el_0.5.0-1.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 6.1.0-20-amd64 #1 SMP PREEMPT_DYNAMIC Debian 6.1.85-1 (2024-04-11) x86_64 GNU/Linux
+  Linux i-capture-the-hostname 6.6.13+bpo-amd64 #1 SMP PREEMPT_DYNAMIC Debian 6.6.13-1~bpo12+1 (2024-02-15) x86_64 GNU/Linux
 I: ls -l /bin
-  lrwxrwxrwx 1 root root 7 May  3 07:42 /bin -> usr/bin
-I: user script /srv/workspace/pbuilder/3552804/tmp/hooks/D02_print_environment finished
+  lrwxrwxrwx 1 root root 7 Jun  5 14:06 /bin -> usr/bin
+I: user script /srv/workspace/pbuilder/2009444/tmp/hooks/D02_print_environment finished
  -> Attempting to satisfy build-dependencies
  -> Creating pbuilder-satisfydepends-dummy package
 Package: pbuilder-satisfydepends-dummy
@@ -227,7 +259,7 @@
 Get: 115 http://deb.debian.org/debian unstable/main amd64 libtext-glob-perl all 0.11-3 [7676 B]
 Get: 116 http://deb.debian.org/debian unstable/main amd64 libfile-find-rule-perl all 0.34-3 [26.6 kB]
 Get: 117 http://deb.debian.org/debian unstable/main amd64 dh-elpa all 2.0.17 [31.0 kB]
-Fetched 92.4 MB in 3s (28.3 MB/s)
+Fetched 92.4 MB in 1s (93.5 MB/s)
 debconf: delaying package configuration, since apt-utils is not installed
 Selecting previously unselected package libapparmor1:amd64.
 (Reading database ... 
(Reading database ... 5%
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(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 ... 19699 files and directories currently installed.)
@@ -738,7 +770,11 @@
 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_0.5.0-1_source.changes
+I: user script /srv/workspace/pbuilder/2009444/tmp/hooks/A99_set_merged_usr starting
+Not re-configuring usrmerge for unstable
+I: user script /srv/workspace/pbuilder/2009444/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_0.5.0-1_source.changes
 dpkg-buildpackage: info: source package mocker-el
 dpkg-buildpackage: info: source version 0.5.0-1
 dpkg-buildpackage: info: source distribution unstable
@@ -763,38 +799,38 @@
 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\")" -f package-initialize -L . -L test -l test/mocker-test.el --eval \(ert-run-tests-batch-and-exit\)
-Running 29 tests (2024-05-04 14:52:18+0000, selector `t')
-   passed   1/29  mocker-inhibit-mock-not-consumed (0.000495 sec)
-   passed   2/29  mocker-inhibit-mocking (0.000286 sec)
-   passed   3/29  mocker-let-basic (0.000088 sec)
-   passed   4/29  mocker-let-multiple (0.000286 sec)
-   passed   5/29  mocker-let-multiple-calls-exact (0.000330 sec)
-   passed   6/29  mocker-let-multiple-calls-illimited (0.000406 sec)
-   passed   7/29  mocker-let-multiple-calls-min (0.000358 sec)
-   passed   8/29  mocker-let-multiple-calls-multiple-records (0.000424 sec)
-   passed   9/29  mocker-let-multiple-calls-multiple-same-records (0.000427 sec)
-   passed  10/29  mocker-let-multiple-calls-unexpected (0.000590 sec)
-   passed  11/29  mocker-let-multiple-calls-unexpected-exact (0.000256 sec)
-   passed  12/29  mocker-let-multiple-calls-unordered (0.000384 sec)
-   passed  13/29  mocker-let-multiple-inputs (0.000268 sec)
-   passed  14/29  mocker-let-multiple-inputs-invalid (0.000271 sec)
-   passed  15/29  mocker-let-multiple-output-generator (0.000292 sec)
-   passed  16/29  mocker-let-nested (0.000282 sec)
-   passed  17/29  mocker-let-no-record (0.000104 sec)
-   passed  18/29  mocker-let-single (0.000216 sec)
-   passed  19/29  mocker-let-single-implicit-records (0.000170 sec)
-   passed  20/29  mocker-let-single-input-matcher (0.000246 sec)
-   passed  21/29  mocker-let-single-input-matcher-invalid (0.000188 sec)
-   passed  22/29  mocker-let-stub-limited (0.000324 sec)
-   passed  23/29  mocker-let-stub-simple (0.000237 sec)
-   passed  24/29  mocker-let-stub-simple-explicit (0.000247 sec)
-   passed  25/29  mocker-passthrough-basic (0.000307 sec)
-   passed  26/29  mocker-passthrough-mixed (0.000321 sec)
-   passed  27/29  mocker-passthrough-mixed-error (0.000327 sec)
-   passed  28/29  mocker-passthrough-multiple (0.000482 sec)
-   passed  29/29  mocker-rest-args (0.000180 sec)
+Running 29 tests (2025-06-06 21:16:21+0000, selector `t')
+   passed   1/29  mocker-inhibit-mock-not-consumed (0.000289 sec)
+   passed   2/29  mocker-inhibit-mocking (0.000190 sec)
+   passed   3/29  mocker-let-basic (0.000067 sec)
+   passed   4/29  mocker-let-multiple (0.000190 sec)
+   passed   5/29  mocker-let-multiple-calls-exact (0.000232 sec)
+   passed   6/29  mocker-let-multiple-calls-illimited (0.000229 sec)
+   passed   7/29  mocker-let-multiple-calls-min (0.000198 sec)
+   passed   8/29  mocker-let-multiple-calls-multiple-records (0.000299 sec)
+   passed   9/29  mocker-let-multiple-calls-multiple-same-records (0.000211 sec)
+   passed  10/29  mocker-let-multiple-calls-unexpected (0.000180 sec)
+   passed  11/29  mocker-let-multiple-calls-unexpected-exact (0.000169 sec)
+   passed  12/29  mocker-let-multiple-calls-unordered (0.000250 sec)
+   passed  13/29  mocker-let-multiple-inputs (0.000165 sec)
+   passed  14/29  mocker-let-multiple-inputs-invalid (0.000172 sec)
+   passed  15/29  mocker-let-multiple-output-generator (0.000178 sec)
+   passed  16/29  mocker-let-nested (0.000178 sec)
+   passed  17/29  mocker-let-no-record (0.000083 sec)
+   passed  18/29  mocker-let-single (0.000175 sec)
+   passed  19/29  mocker-let-single-implicit-records (0.000138 sec)
+   passed  20/29  mocker-let-single-input-matcher (0.000140 sec)
+   passed  21/29  mocker-let-single-input-matcher-invalid (0.000142 sec)
+   passed  22/29  mocker-let-stub-limited (0.000224 sec)
+   passed  23/29  mocker-let-stub-simple (0.000138 sec)
+   passed  24/29  mocker-let-stub-simple-explicit (0.000152 sec)
+   passed  25/29  mocker-passthrough-basic (0.000193 sec)
+   passed  26/29  mocker-passthrough-mixed (0.000192 sec)
+   passed  27/29  mocker-passthrough-mixed-error (0.000210 sec)
+   passed  28/29  mocker-passthrough-multiple (0.000302 sec)
+   passed  29/29  mocker-rest-args (0.000125 sec)
 
-Ran 29 tests, 29 results as expected, 0 unexpected (2024-05-04 14:52:18+0000, 0.026208 sec)
+Ran 29 tests, 29 results as expected, 0 unexpected (2025-06-06 21:16:21+0000, 0.007181 sec)
 
    create-stamp debian/debhelper-build-stamp
    dh_prep
@@ -820,12 +856,14 @@
 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/2009444/tmp/hooks/B01_cleanup starting
+I: user script /srv/workspace/pbuilder/2009444/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/3552804 and its subdirectories
-I: Current time: Sat May  4 02:52:30 -12 2024
-I: pbuilder-time-stamp: 1714834350
+I: removing directory /srv/workspace/pbuilder/2009444 and its subdirectories
+I: Current time: Sat Jun  7 11:16:25 +14 2025
+I: pbuilder-time-stamp: 1749244585