Diff of the two buildlogs:

--
--- b1/build.log	2024-11-07 18:06:23.396253480 +0000
+++ b2/build.log	2024-11-07 18:07:52.381072484 +0000
@@ -1,6 +1,6 @@
 I: pbuilder: network access will be disabled during build
-I: Current time: Wed Dec 10 12:27:42 -12 2025
-I: pbuilder-time-stamp: 1765412862
+I: Current time: Thu Dec 11 14:29:26 +14 2025
+I: pbuilder-time-stamp: 1765412966
 I: Building the build Environment
 I: extracting base tarball [/var/cache/pbuilder/trixie-reproducible-base.tgz]
 I: copying local configuration
@@ -26,52 +26,84 @@
 dpkg-source: info: unpacking parsebib_4.7-1.debian.tar.xz
 I: Not using root during the build.
 I: Installing the build-deps
-I: user script /srv/workspace/pbuilder/223089/tmp/hooks/D02_print_environment starting
+I: user script /srv/workspace/pbuilder/489139/tmp/hooks/D01_modify_environment starting
+debug: Running on codethink01-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 11 00:29 /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/489139/tmp/hooks/D01_modify_environment finished
+I: user script /srv/workspace/pbuilder/489139/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]="32" [3]="1" [4]="release" [5]="aarch64-unknown-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=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='da93caabe6b945b6b034091473d70a51'
-  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='223089'
-  PS1='# '
-  PS2='> '
+  INVOCATION_ID=6bece122e54e49929815e785422d7c36
+  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=489139
   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.cEk3lbnE/pbuilderrc_ti87 --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.cEk3lbnE/b1 --logfile b1/build.log parsebib_4.7-1.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.cEk3lbnE/pbuilderrc_5jTJ --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.cEk3lbnE/b2 --logfile b2/build.log parsebib_4.7-1.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 codethink03-arm64 6.1.0-26-cloud-arm64 #1 SMP Debian 6.1.112-1 (2024-09-30) aarch64 GNU/Linux
+  Linux i-capture-the-hostname 6.1.0-26-cloud-arm64 #1 SMP Debian 6.1.112-1 (2024-09-30) aarch64 GNU/Linux
 I: ls -l /bin
   lrwxrwxrwx 1 root root 7 Aug  4  2024 /bin -> usr/bin
-I: user script /srv/workspace/pbuilder/223089/tmp/hooks/D02_print_environment finished
+I: user script /srv/workspace/pbuilder/489139/tmp/hooks/D02_print_environment finished
  -> Attempting to satisfy build-dependencies
  -> Creating pbuilder-satisfydepends-dummy package
 Package: pbuilder-satisfydepends-dummy
@@ -199,7 +231,7 @@
 Get: 88 http://deb.debian.org/debian trixie/main arm64 libtext-glob-perl all 0.11-3 [7676 B]
 Get: 89 http://deb.debian.org/debian trixie/main arm64 libfile-find-rule-perl all 0.34-3 [26.6 kB]
 Get: 90 http://deb.debian.org/debian trixie/main arm64 dh-elpa all 2.1.5 [29.7 kB]
-Fetched 73.7 MB in 1s (87.3 MB/s)
+Fetched 73.7 MB in 1s (94.3 MB/s)
 debconf: delaying package configuration, since apt-utils is not installed
 Selecting previously unselected package install-info.
 (Reading database ... 
(Reading database ... 5%
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(Reading database ... 85%
(Reading database ... 90%
(Reading database ... 95%
(Reading database ... 100%
(Reading database ... 20089 files and directories currently installed.)
@@ -591,7 +623,11 @@
 Building tag database...
  -> Finished parsing the build-deps
 I: Building the package
-I: Running cd /build/reproducible-path/parsebib-4.7/ && 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  > ../parsebib_4.7-1_source.changes
+I: user script /srv/workspace/pbuilder/489139/tmp/hooks/A99_set_merged_usr starting
+Not re-configuring usrmerge for trixie
+I: user script /srv/workspace/pbuilder/489139/tmp/hooks/A99_set_merged_usr finished
+hostname: Name or service not known
+I: Running cd /build/reproducible-path/parsebib-4.7/ && 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  > ../parsebib_4.7-1_source.changes
 dpkg-buildpackage: info: source package parsebib
 dpkg-buildpackage: info: source version 4.7-1
 dpkg-buildpackage: info: source distribution unstable
@@ -607,38 +643,38 @@
    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 test -l test/parsebib-test.el --eval \(ert-run-tests-batch-and-exit\)
-Running 29 tests (2025-12-11 00:29:15+0000, selector `t')
-   passed   1/29  parsebib-clean-TeX-markup-braces (0.000199 sec)
-   passed   2/29  parsebib-clean-TeX-markup-dashes (0.000267 sec)
-   passed   3/29  parsebib-clean-TeX-markup-diacritics-with-braces (0.000469 sec)
-   passed   4/29  parsebib-clean-TeX-markup-emph (0.000208 sec)
-   passed   5/29  parsebib-clean-TeX-markup-escapable-characters (0.000167 sec)
-   passed   6/29  parsebib-clean-TeX-markup-letter-diacritics-without-braces (0.000356 sec)
-   passed   7/29  parsebib-clean-TeX-markup-math-and-text-mode-commands (0.000224 sec)
-   passed   8/29  parsebib-clean-TeX-markup-nested-macros (0.000128 sec)
-   passed   9/29  parsebib-clean-TeX-markup-nonascii-letters-with-braces (0.000548 sec)
-   passed  10/29  parsebib-clean-TeX-markup-nonascii-letters-without-braces (0.000555 sec)
-   passed  11/29  parsebib-clean-TeX-markup-nonletter-diacritics-without-braces (0.000230 sec)
-   passed  12/29  parsebib-clean-TeX-markup-other-commands (0.000196 sec)
-   passed  13/29  parsebib-clean-TeX-markup-quotes (0.000098 sec)
-   passed  14/29  parsebib-clean-TeX-markup-textbf (0.000087 sec)
-   passed  15/29  parsebib-clean-TeX-markup-textit (0.000077 sec)
-   passed  16/29  parsebib-clean-TeX-markup-textsc (0.000078 sec)
-   passed  17/29  parsebib-test-json-stringify-date-field (0.000787 sec)
-   passed  18/29  parsebib-test-json-stringify-date-part (0.000354 sec)
-   passed  19/29  parsebib-test-json-stringify-name-field (0.000430 sec)
-   passed  20/29  parsebib-test-parse-bib-buffer-@Strings (0.000482 sec)
-   passed  21/29  parsebib-test-parse-bib-buffer-TeX-markup (0.000555 sec)
-   passed  22/29  parsebib-test-parse-bib-buffer-braces-in-file-field (0.000416 sec)
-   passed  23/29  parsebib-test-parse-bib-buffer-collapse-whitespace (0.000371 sec)
-   passed  24/29  parsebib-test-parse-bib-buffer-dont-collapse-whitespace-in-file-field (0.000350 sec)
-   passed  25/29  parsebib-test-stringify-json-field--array-fields (0.000075 sec)
-   passed  26/29  parsebib-test-stringify-json-field--date-fields (0.000580 sec)
-   passed  27/29  parsebib-test-stringify-json-field--name-fields (0.000378 sec)
-   passed  28/29  parsebib-test-stringify-json-field--number-fields (0.000059 sec)
-   passed  29/29  parsebib-test-stringify-json-field--string-fields (0.000091 sec)
+Running 29 tests (2025-12-11 00:30:47+0000, selector `t')
+   passed   1/29  parsebib-clean-TeX-markup-braces (0.000166 sec)
+   passed   2/29  parsebib-clean-TeX-markup-dashes (0.000273 sec)
+   passed   3/29  parsebib-clean-TeX-markup-diacritics-with-braces (0.000479 sec)
+   passed   4/29  parsebib-clean-TeX-markup-emph (0.000110 sec)
+   passed   5/29  parsebib-clean-TeX-markup-escapable-characters (0.000175 sec)
+   passed   6/29  parsebib-clean-TeX-markup-letter-diacritics-without-braces (0.000353 sec)
+   passed   7/29  parsebib-clean-TeX-markup-math-and-text-mode-commands (0.000222 sec)
+   passed   8/29  parsebib-clean-TeX-markup-nested-macros (0.000131 sec)
+   passed   9/29  parsebib-clean-TeX-markup-nonascii-letters-with-braces (0.000579 sec)
+   passed  10/29  parsebib-clean-TeX-markup-nonascii-letters-without-braces (0.000543 sec)
+   passed  11/29  parsebib-clean-TeX-markup-nonletter-diacritics-without-braces (0.000253 sec)
+   passed  12/29  parsebib-clean-TeX-markup-other-commands (0.000210 sec)
+   passed  13/29  parsebib-clean-TeX-markup-quotes (0.000085 sec)
+   passed  14/29  parsebib-clean-TeX-markup-textbf (0.000082 sec)
+   passed  15/29  parsebib-clean-TeX-markup-textit (0.000081 sec)
+   passed  16/29  parsebib-clean-TeX-markup-textsc (0.000080 sec)
+   passed  17/29  parsebib-test-json-stringify-date-field (0.000837 sec)
+   passed  18/29  parsebib-test-json-stringify-date-part (0.000205 sec)
+   passed  19/29  parsebib-test-json-stringify-name-field (0.000367 sec)
+   passed  20/29  parsebib-test-parse-bib-buffer-@Strings (0.000468 sec)
+   passed  21/29  parsebib-test-parse-bib-buffer-TeX-markup (0.000392 sec)
+   passed  22/29  parsebib-test-parse-bib-buffer-braces-in-file-field (0.000397 sec)
+   passed  23/29  parsebib-test-parse-bib-buffer-collapse-whitespace (0.000376 sec)
+   passed  24/29  parsebib-test-parse-bib-buffer-dont-collapse-whitespace-in-file-field (0.000341 sec)
+   passed  25/29  parsebib-test-stringify-json-field--array-fields (0.000071 sec)
+   passed  26/29  parsebib-test-stringify-json-field--date-fields (0.000559 sec)
+   passed  27/29  parsebib-test-stringify-json-field--name-fields (0.000406 sec)
+   passed  28/29  parsebib-test-stringify-json-field--number-fields (0.000086 sec)
+   passed  29/29  parsebib-test-stringify-json-field--string-fields (0.000071 sec)
 
-Ran 29 tests, 29 results as expected, 0 unexpected (2025-12-11 00:29:15+0000, 0.038811 sec)
+Ran 29 tests, 29 results as expected, 0 unexpected (2025-12-11 00:30:47+0000, 0.011970 sec)
 
    create-stamp debian/debhelper-build-stamp
    dh_prep
@@ -664,12 +700,14 @@
 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/489139/tmp/hooks/B01_cleanup starting
+I: user script /srv/workspace/pbuilder/489139/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/223089 and its subdirectories
-I: Current time: Wed Dec 10 12:29:21 -12 2025
-I: pbuilder-time-stamp: 1765412961
+I: removing directory /srv/workspace/pbuilder/489139 and its subdirectories
+I: Current time: Thu Dec 11 14:30:50 +14 2025
+I: pbuilder-time-stamp: 1765413050