Diff of the two buildlogs:

--
--- b1/build.log	2024-11-11 23:56:03.373790436 +0000
+++ b2/build.log	2024-11-11 23:58:58.211539605 +0000
@@ -1,6 +1,6 @@
 I: pbuilder: network access will be disabled during build
-I: Current time: Mon Nov 11 11:54:50 -12 2024
-I: pbuilder-time-stamp: 1731369290
+I: Current time: Tue Nov 12 13:56:14 +14 2024
+I: pbuilder-time-stamp: 1731369374
 I: Building the build Environment
 I: extracting base tarball [/var/cache/pbuilder/unstable-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/10112/tmp/hooks/D02_print_environment starting
+I: user script /srv/workspace/pbuilder/3927/tmp/hooks/D01_modify_environment starting
+debug: Running on virt32z.
+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 11 23:56 /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/3927/tmp/hooks/D01_modify_environment finished
+I: user script /srv/workspace/pbuilder/3927/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='armhf'
-  DEBIAN_FRONTEND='noninteractive'
-  DEB_BUILD_OPTIONS='buildinfo=+all reproducible=+all parallel=3 '
-  DISTRIBUTION='unstable'
-  HOME='/root'
-  HOST_ARCH='armhf'
+  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]="arm-unknown-linux-gnueabihf")
+  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=armhf
+  DEBIAN_FRONTEND=noninteractive
+  DEB_BUILD_OPTIONS='buildinfo=+all reproducible=+all parallel=4 '
+  DIRSTACK=()
+  DISTRIBUTION=unstable
+  EUID=0
+  FUNCNAME=([0]="Echo" [1]="main")
+  GROUPS=()
+  HOME=/root
+  HOSTNAME=i-capture-the-hostname
+  HOSTTYPE=arm
+  HOST_ARCH=armhf
   IFS=' 	
   '
-  INVOCATION_ID='4682259eaff7476ba4fa97d0b0bc594c'
-  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='10112'
-  PS1='# '
-  PS2='> '
+  INVOCATION_ID=74dc7d690c7242f8813467f9a090571d
+  LANG=C
+  LANGUAGE=it_CH:it
+  LC_ALL=C
+  MACHTYPE=arm-unknown-linux-gnueabihf
+  MAIL=/var/mail/root
+  OPTERR=1
+  OPTIND=1
+  OSTYPE=linux-gnueabihf
+  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=3927
   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.CssItUx2/pbuilderrc_QjaJ --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.CssItUx2/b1 --logfile b1/build.log parsebib_4.7-1.dsc'
-  SUDO_GID='113'
-  SUDO_UID='107'
-  SUDO_USER='jenkins'
-  TERM='unknown'
-  TZ='/usr/share/zoneinfo/Etc/GMT+12'
-  USER='root'
-  _='/usr/bin/systemd-run'
-  http_proxy='http://10.0.0.15:3142/'
+  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.CssItUx2/pbuilderrc_4k0Y --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.CssItUx2/b2 --logfile b2/build.log parsebib_4.7-1.dsc'
+  SUDO_GID=110
+  SUDO_UID=103
+  SUDO_USER=jenkins
+  TERM=unknown
+  TZ=/usr/share/zoneinfo/Etc/GMT-14
+  UID=0
+  USER=root
+  _='I: set'
+  http_proxy=http://10.0.0.15:3142/
 I: uname -a
-  Linux virt64b 6.1.0-27-arm64 #1 SMP Debian 6.1.115-1 (2024-11-01) aarch64 GNU/Linux
+  Linux i-capture-the-hostname 6.1.0-27-armmp-lpae #1 SMP Debian 6.1.115-1 (2024-11-01) armv7l GNU/Linux
 I: ls -l /bin
   lrwxrwxrwx 1 root root 7 Aug  4 21:30 /bin -> usr/bin
-I: user script /srv/workspace/pbuilder/10112/tmp/hooks/D02_print_environment finished
+I: user script /srv/workspace/pbuilder/3927/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 unstable/main armhf libtext-glob-perl all 0.11-3 [7676 B]
 Get: 89 http://deb.debian.org/debian unstable/main armhf libfile-find-rule-perl all 0.34-3 [26.6 kB]
 Get: 90 http://deb.debian.org/debian unstable/main armhf dh-elpa all 2.1.5 [29.7 kB]
-Fetched 72.1 MB in 2s (37.7 MB/s)
+Fetched 72.1 MB in 2s (37.4 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%
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(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 ... 19689 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/3927/tmp/hooks/A99_set_merged_usr starting
+Not re-configuring usrmerge for unstable
+I: user script /srv/workspace/pbuilder/3927/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 (2024-11-11 23:55:49+0000, selector `t')
-   passed   1/29  parsebib-clean-TeX-markup-braces (0.000370 sec)
-   passed   2/29  parsebib-clean-TeX-markup-dashes (0.000821 sec)
-   passed   3/29  parsebib-clean-TeX-markup-diacritics-with-braces (0.001381 sec)
-   passed   4/29  parsebib-clean-TeX-markup-emph (0.000277 sec)
-   passed   5/29  parsebib-clean-TeX-markup-escapable-characters (0.000476 sec)
-   passed   6/29  parsebib-clean-TeX-markup-letter-diacritics-without-braces (0.001057 sec)
-   passed   7/29  parsebib-clean-TeX-markup-math-and-text-mode-commands (0.000743 sec)
-   passed   8/29  parsebib-clean-TeX-markup-nested-macros (0.000383 sec)
-   passed   9/29  parsebib-clean-TeX-markup-nonascii-letters-with-braces (0.001775 sec)
-   passed  10/29  parsebib-clean-TeX-markup-nonascii-letters-without-braces (0.001657 sec)
-   passed  11/29  parsebib-clean-TeX-markup-nonletter-diacritics-without-braces (0.000804 sec)
-   passed  12/29  parsebib-clean-TeX-markup-other-commands (0.000662 sec)
-   passed  13/29  parsebib-clean-TeX-markup-quotes (0.000242 sec)
-   passed  14/29  parsebib-clean-TeX-markup-textbf (0.000286 sec)
-   passed  15/29  parsebib-clean-TeX-markup-textit (0.000256 sec)
-   passed  16/29  parsebib-clean-TeX-markup-textsc (0.000256 sec)
-   passed  17/29  parsebib-test-json-stringify-date-field (0.002857 sec)
-   passed  18/29  parsebib-test-json-stringify-date-part (0.000646 sec)
-   passed  19/29  parsebib-test-json-stringify-name-field (0.001407 sec)
-   passed  20/29  parsebib-test-parse-bib-buffer-@Strings (0.001280 sec)
-   passed  21/29  parsebib-test-parse-bib-buffer-TeX-markup (0.001261 sec)
-   passed  22/29  parsebib-test-parse-bib-buffer-braces-in-file-field (0.001210 sec)
-   passed  23/29  parsebib-test-parse-bib-buffer-collapse-whitespace (0.001163 sec)
-   passed  24/29  parsebib-test-parse-bib-buffer-dont-collapse-whitespace-in-file-field (0.001166 sec)
-   passed  25/29  parsebib-test-stringify-json-field--array-fields (0.000232 sec)
-   passed  26/29  parsebib-test-stringify-json-field--date-fields (0.001871 sec)
-   passed  27/29  parsebib-test-stringify-json-field--name-fields (0.001290 sec)
-   passed  28/29  parsebib-test-stringify-json-field--number-fields (0.000189 sec)
-   passed  29/29  parsebib-test-stringify-json-field--string-fields (0.000199 sec)
+Running 29 tests (2024-11-11 23:58:38+0000, selector `t')
+   passed   1/29  parsebib-clean-TeX-markup-braces (0.000271 sec)
+   passed   2/29  parsebib-clean-TeX-markup-dashes (0.000592 sec)
+   passed   3/29  parsebib-clean-TeX-markup-diacritics-with-braces (0.001069 sec)
+   passed   4/29  parsebib-clean-TeX-markup-emph (0.000298 sec)
+   passed   5/29  parsebib-clean-TeX-markup-escapable-characters (0.000343 sec)
+   passed   6/29  parsebib-clean-TeX-markup-letter-diacritics-without-braces (0.000768 sec)
+   passed   7/29  parsebib-clean-TeX-markup-math-and-text-mode-commands (0.000642 sec)
+   passed   8/29  parsebib-clean-TeX-markup-nested-macros (0.000370 sec)
+   passed   9/29  parsebib-clean-TeX-markup-nonascii-letters-with-braces (0.001394 sec)
+   passed  10/29  parsebib-clean-TeX-markup-nonascii-letters-without-braces (0.001290 sec)
+   passed  11/29  parsebib-clean-TeX-markup-nonletter-diacritics-without-braces (0.000652 sec)
+   passed  12/29  parsebib-clean-TeX-markup-other-commands (0.000497 sec)
+   passed  13/29  parsebib-clean-TeX-markup-quotes (0.000286 sec)
+   passed  14/29  parsebib-clean-TeX-markup-textbf (0.000207 sec)
+   passed  15/29  parsebib-clean-TeX-markup-textit (0.000180 sec)
+   passed  16/29  parsebib-clean-TeX-markup-textsc (0.000172 sec)
+   passed  17/29  parsebib-test-json-stringify-date-field (0.002243 sec)
+   passed  18/29  parsebib-test-json-stringify-date-part (0.000464 sec)
+   passed  19/29  parsebib-test-json-stringify-name-field (0.001001 sec)
+   passed  20/29  parsebib-test-parse-bib-buffer-@Strings (0.001236 sec)
+   passed  21/29  parsebib-test-parse-bib-buffer-TeX-markup (0.001216 sec)
+   passed  22/29  parsebib-test-parse-bib-buffer-braces-in-file-field (0.000931 sec)
+   passed  23/29  parsebib-test-parse-bib-buffer-collapse-whitespace (0.000847 sec)
+   passed  24/29  parsebib-test-parse-bib-buffer-dont-collapse-whitespace-in-file-field (0.000866 sec)
+   passed  25/29  parsebib-test-stringify-json-field--array-fields (0.000237 sec)
+   passed  26/29  parsebib-test-stringify-json-field--date-fields (0.001503 sec)
+   passed  27/29  parsebib-test-stringify-json-field--name-fields (0.001153 sec)
+   passed  28/29  parsebib-test-stringify-json-field--number-fields (0.000161 sec)
+   passed  29/29  parsebib-test-stringify-json-field--string-fields (0.000147 sec)
 
-Ran 29 tests, 29 results as expected, 0 unexpected (2024-11-11 23:55:50+0000, 0.031562 sec)
+Ran 29 tests, 29 results as expected, 0 unexpected (2024-11-11 23:58:39+0000, 0.066068 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/3927/tmp/hooks/B01_cleanup starting
+I: user script /srv/workspace/pbuilder/3927/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/10112 and its subdirectories
-I: Current time: Mon Nov 11 11:55:57 -12 2024
-I: pbuilder-time-stamp: 1731369357
+I: removing directory /srv/workspace/pbuilder/3927 and its subdirectories
+I: Current time: Tue Nov 12 13:58:53 +14 2024
+I: pbuilder-time-stamp: 1731369533