Diff of the two buildlogs:

--
--- b1/build.log	2024-12-19 11:45:39.304295790 +0000
+++ b2/build.log	2024-12-19 11:46:27.226137477 +0000
@@ -1,6 +1,6 @@
 I: pbuilder: network access will be disabled during build
-I: Current time: Wed Jan 21 06:07:13 -12 2026
-I: pbuilder-time-stamp: 1769018833
+I: Current time: Fri Dec 20 01:45:42 +14 2024
+I: pbuilder-time-stamp: 1734608742
 I: Building the build Environment
 I: extracting base tarball [/var/cache/pbuilder/trixie-reproducible-base.tgz]
 I: copying local configuration
@@ -29,52 +29,84 @@
 dpkg-source: info: applying remove-external-HTML-resources.patch
 I: Not using root during the build.
 I: Installing the build-deps
-I: user script /srv/workspace/pbuilder/1336015/tmp/hooks/D02_print_environment starting
+I: user script /srv/workspace/pbuilder/1790036/tmp/hooks/D01_modify_environment starting
+debug: Running on codethink02-arm64.
+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 Dec 19 11:45 /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/1790036/tmp/hooks/D01_modify_environment finished
+I: user script /srv/workspace/pbuilder/1790036/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='arm64'
-  DEBIAN_FRONTEND='noninteractive'
+  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]="aarch64-unknown-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=arm64
+  DEBIAN_FRONTEND=noninteractive
   DEB_BUILD_OPTIONS='buildinfo=+all reproducible=+all parallel=12 '
-  DISTRIBUTION='trixie'
-  HOME='/root'
-  HOST_ARCH='arm64'
+  DIRSTACK=()
+  DISTRIBUTION=trixie
+  EUID=0
+  FUNCNAME=([0]="Echo" [1]="main")
+  GROUPS=()
+  HOME=/root
+  HOSTNAME=i-capture-the-hostname
+  HOSTTYPE=aarch64
+  HOST_ARCH=arm64
   IFS=' 	
   '
-  INVOCATION_ID='031eacd93af2410081b66fc7057c12c6'
-  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='1336015'
-  PS1='# '
-  PS2='> '
+  INVOCATION_ID=4ff5479e24fc4c719da162c1d1621874
+  LANG=C
+  LANGUAGE=nl_BE:nl
+  LC_ALL=C
+  MACHTYPE=aarch64-unknown-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=1790036
   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.0A7419XN/pbuilderrc_cOst --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.0A7419XN/b1 --logfile b1/build.log ebib_2.44.1-1.dsc'
-  SUDO_GID='109'
-  SUDO_UID='104'
-  SUDO_USER='jenkins'
-  TERM='unknown'
-  TZ='/usr/share/zoneinfo/Etc/GMT+12'
-  USER='root'
-  _='/usr/bin/systemd-run'
-  http_proxy='http://192.168.101.4:3128'
+  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.0A7419XN/pbuilderrc_M8LA --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.0A7419XN/b2 --logfile b2/build.log ebib_2.44.1-1.dsc'
+  SUDO_GID=109
+  SUDO_UID=104
+  SUDO_USER=jenkins
+  TERM=unknown
+  TZ=/usr/share/zoneinfo/Etc/GMT-14
+  UID=0
+  USER=root
+  _='I: set'
+  http_proxy=http://192.168.101.4:3128
 I: uname -a
-  Linux codethink01-arm64 6.1.0-28-cloud-arm64 #1 SMP Debian 6.1.119-1 (2024-11-22) aarch64 GNU/Linux
+  Linux i-capture-the-hostname 6.1.0-28-cloud-arm64 #1 SMP Debian 6.1.119-1 (2024-11-22) aarch64 GNU/Linux
 I: ls -l /bin
-  lrwxrwxrwx 1 root root 7 Nov 22  2024 /bin -> usr/bin
-I: user script /srv/workspace/pbuilder/1336015/tmp/hooks/D02_print_environment finished
+  lrwxrwxrwx 1 root root 7 Nov 22 14:40 /bin -> usr/bin
+I: user script /srv/workspace/pbuilder/1790036/tmp/hooks/D02_print_environment finished
  -> Attempting to satisfy build-dependencies
  -> Creating pbuilder-satisfydepends-dummy package
 Package: pbuilder-satisfydepends-dummy
@@ -233,7 +265,7 @@
 Get: 109 http://deb.debian.org/debian trixie/main arm64 tex-common all 6.18 [32.5 kB]
 Get: 110 http://deb.debian.org/debian trixie/main arm64 texinfo-lib arm64 7.1.1-1+b1 [220 kB]
 Get: 111 http://deb.debian.org/debian trixie/main arm64 texinfo all 7.1.1-1 [1753 kB]
-Fetched 104 MB in 1s (170 MB/s)
+Fetched 104 MB in 0s (240 MB/s)
 debconf: delaying package configuration, since apt-utils is not installed
 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 ... 20076 files and directories currently installed.)
@@ -699,12 +731,12 @@
 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-with-simulated-input for emacs
-install/with-simulated-input-3.0: Handling install of emacsen flavor emacs
-install/with-simulated-input-3.0: byte-compiling for emacs
 Install elpa-seq for emacs
 install/seq-2.24: Handling install of emacsen flavor emacs
 install/seq-2.24: byte-compiling for emacs
+Install elpa-with-simulated-input for emacs
+install/with-simulated-input-3.0: Handling install of emacsen flavor emacs
+install/with-simulated-input-3.0: byte-compiling for emacs
 Install elpa-compat for emacs
 install/compat-30.0.0.0: Handling install of emacsen flavor emacs
 install/compat-30.0.0.0: byte-compiling for emacs
@@ -730,7 +762,11 @@
 Building tag database...
  -> Finished parsing the build-deps
 I: Building the package
-I: Running cd /build/reproducible-path/ebib-2.44.1/ && 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  > ../ebib_2.44.1-1_source.changes
+I: user script /srv/workspace/pbuilder/1790036/tmp/hooks/A99_set_merged_usr starting
+Not re-configuring usrmerge for trixie
+I: user script /srv/workspace/pbuilder/1790036/tmp/hooks/A99_set_merged_usr finished
+hostname: Name or service not known
+I: Running cd /build/reproducible-path/ebib-2.44.1/ && 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  > ../ebib_2.44.1-1_source.changes
 dpkg-buildpackage: info: source package ebib
 dpkg-buildpackage: info: source version 2.44.1-1
 dpkg-buildpackage: info: source distribution unstable
@@ -776,25 +812,25 @@
 make[1]: Leaving directory '/build/reproducible-path/ebib-2.44.1'
    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/ebib-test.el --eval \(ert-run-tests-batch-and-exit\)
-Running 16 tests (2026-01-21 18:08:30+0000, selector `t')
-   passed   1/16  ebib--create-citation-org-mode (0.084990 sec)
-   passed   2/16  ebib--create-citation-with-repeater (0.013267 sec)
-   passed   3/16  ebib--create-citation-with-repeater-with-arguments (0.017743 sec)
-   passed   4/16  ebib--create-citation-with-repeater-with-empty-arguments (0.017506 sec)
-   passed   5/16  ebib--split-citation-with-repeater (0.000062 sec)
-   passed   6/16  ebib--split-citation-with-repeater-with-arguments (0.000053 sec)
-   passed   7/16  ebib--split-citation-without-repeater (0.000067 sec)
-   passed   8/16  ebib-citation-with-argument-and-key-and-argument-directives-should-prompt-the-user (0.017087 sec)
-   passed   9/16  ebib-citation-with-argument-and-key-directives-should-prompt-the-user (0.017074 sec)
-   passed  10/16  ebib-citation-with-argument-directive-should-accept-spaces-in-args (0.017271 sec)
-   passed  11/16  ebib-citation-with-argument-directive-should-prompt-the-user (0.017004 sec)
-   passed  12/16  ebib-citation-with-empty-template-should-come-through (0.000137 sec)
-   passed  13/16  ebib-citation-with-key-and-argument-directives-should-prompt-the-user (0.012972 sec)
-   passed  14/16  ebib-citation-with-key-directive-and-surrounding-material-should-get-key-with-the-surrounded-material (0.000146 sec)
-   passed  15/16  ebib-citation-with-key-directive-should-catch-the-key (0.000055 sec)
-   passed  16/16  ebib-citation-with-no-directives-in-template-should-come-through (0.000048 sec)
+Running 16 tests (2024-12-19 11:46:21+0000, selector `t')
+   passed   1/16  ebib--create-citation-org-mode (0.050176 sec)
+   passed   2/16  ebib--create-citation-with-repeater (0.009514 sec)
+   passed   3/16  ebib--create-citation-with-repeater-with-arguments (0.009427 sec)
+   passed   4/16  ebib--create-citation-with-repeater-with-empty-arguments (0.008927 sec)
+   passed   5/16  ebib--split-citation-with-repeater (0.000049 sec)
+   passed   6/16  ebib--split-citation-with-repeater-with-arguments (0.000038 sec)
+   passed   7/16  ebib--split-citation-without-repeater (0.000054 sec)
+   passed   8/16  ebib-citation-with-argument-and-key-and-argument-directives-should-prompt-the-user (0.008665 sec)
+   passed   9/16  ebib-citation-with-argument-and-key-directives-should-prompt-the-user (0.008563 sec)
+   passed  10/16  ebib-citation-with-argument-directive-should-accept-spaces-in-args (0.008701 sec)
+   passed  11/16  ebib-citation-with-argument-directive-should-prompt-the-user (0.008617 sec)
+   passed  12/16  ebib-citation-with-empty-template-should-come-through (0.000041 sec)
+   passed  13/16  ebib-citation-with-key-and-argument-directives-should-prompt-the-user (0.008545 sec)
+   passed  14/16  ebib-citation-with-key-directive-and-surrounding-material-should-get-key-with-the-surrounded-material (0.000044 sec)
+   passed  15/16  ebib-citation-with-key-directive-should-catch-the-key (0.000032 sec)
+   passed  16/16  ebib-citation-with-no-directives-in-template-should-come-through (0.000033 sec)
 
-Ran 16 tests, 16 results as expected, 0 unexpected (2026-01-21 18:08:30+0000, 0.252875 sec)
+Ran 16 tests, 16 results as expected, 0 unexpected (2024-12-19 11:46:21+0000, 0.122611 sec)
 
    create-stamp debian/debhelper-build-stamp
    dh_prep
@@ -827,12 +863,14 @@
 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/1790036/tmp/hooks/B01_cleanup starting
+I: user script /srv/workspace/pbuilder/1790036/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/1336015 and its subdirectories
-I: Current time: Wed Jan 21 06:08:36 -12 2026
-I: pbuilder-time-stamp: 1769018916
+I: removing directory /srv/workspace/pbuilder/1790036 and its subdirectories
+I: Current time: Fri Dec 20 01:46:26 +14 2024
+I: pbuilder-time-stamp: 1734608786