Diff of the two buildlogs:

--
--- b1/build.log	2024-01-15 01:12:54.959867857 +0000
+++ b2/build.log	2024-01-15 02:53:54.910662207 +0000
@@ -1,6 +1,6 @@
 I: pbuilder: network access will be disabled during build
-I: Current time: Sun Jan 14 12:05:33 -12 2024
-I: pbuilder-time-stamp: 1705277133
+I: Current time: Mon Jan 15 15:13:13 +14 2024
+I: pbuilder-time-stamp: 1705281193
 I: Building the build Environment
 I: extracting base tarball [/var/cache/pbuilder/bookworm-reproducible-base.tgz]
 I: copying local configuration
@@ -23,49 +23,81 @@
 dpkg-source: info: unpacking live-manual_20151217.2.tar.xz
 I: using fakeroot in build.
 I: Installing the build-deps
-I: user script /srv/workspace/pbuilder/5264/tmp/hooks/D02_print_environment starting
+I: user script /srv/workspace/pbuilder/14823/tmp/hooks/D01_modify_environment starting
+debug: Running on virt64a.
+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 Jan 15 01:13 /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/14823/tmp/hooks/D01_modify_environment finished
+I: user script /srv/workspace/pbuilder/14823/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='bookworm'
-  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]="15" [3]="1" [4]="release" [5]="arm-unknown-linux-gnueabihf")
+  BASH_VERSION='5.2.15(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=bookworm
+  EUID=0
+  FUNCNAME=([0]="Echo" [1]="main")
+  GROUPS=()
+  HOME=/root
+  HOSTNAME=i-capture-the-hostname
+  HOSTTYPE=arm
+  HOST_ARCH=armhf
   IFS=' 	
   '
-  INVOCATION_ID='22c9e09e8f194b06ac464c0290e84321'
-  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='5264'
-  PS1='# '
-  PS2='> '
+  INVOCATION_ID=d26c08df57c9414a8a057db42a52eb23
+  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=14823
   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.9zKgXimh/pbuilderrc_A5Fo --distribution bookworm --hookdir /etc/pbuilder/first-build-hooks --debbuildopts -b --basetgz /var/cache/pbuilder/bookworm-reproducible-base.tgz --buildresult /srv/reproducible-results/rbuild-debian/r-b-build.9zKgXimh/b1 --logfile b1/build.log live-manual_20151217.2.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.9zKgXimh/pbuilderrc_H32g --distribution bookworm --hookdir /etc/pbuilder/rebuild-hooks --debbuildopts -b --basetgz /var/cache/pbuilder/bookworm-reproducible-base.tgz --buildresult /srv/reproducible-results/rbuild-debian/r-b-build.9zKgXimh/b2 --logfile b2/build.log live-manual_20151217.2.dsc'
+  SUDO_GID=114
+  SUDO_UID=108
+  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 virt32a 6.1.0-17-armmp-lpae #1 SMP Debian 6.1.69-1 (2023-12-30) armv7l GNU/Linux
+  Linux i-capture-the-hostname 6.1.0-17-arm64 #1 SMP Debian 6.1.69-1 (2023-12-30) aarch64 GNU/Linux
 I: ls -l /bin
   total 4964
   -rwxr-xr-x 1 root root 838488 Apr 23  2023 bash
@@ -125,7 +157,7 @@
   -rwxr-xr-x 1 root root  67600 Sep 20  2022 rmdir
   -rwxr-xr-x 1 root root  14152 Jul 28 23:46 run-parts
   -rwxr-xr-x 1 root root 133372 Jan  5  2023 sed
-  lrwxrwxrwx 1 root root      4 Jan  5  2023 sh -> dash
+  lrwxrwxrwx 1 root root      9 Jan 15 01:13 sh -> /bin/bash
   -rwxr-xr-x 1 root root  67584 Sep 20  2022 sleep
   -rwxr-xr-x 1 root root  67644 Sep 20  2022 stty
   -rwsr-xr-x 1 root root  50800 Mar 23  2023 su
@@ -151,7 +183,7 @@
   -rwxr-xr-x 1 root root   2206 Apr 10  2022 zless
   -rwxr-xr-x 1 root root   1842 Apr 10  2022 zmore
   -rwxr-xr-x 1 root root   4577 Apr 10  2022 znew
-I: user script /srv/workspace/pbuilder/5264/tmp/hooks/D02_print_environment finished
+I: user script /srv/workspace/pbuilder/14823/tmp/hooks/D02_print_environment finished
  -> Attempting to satisfy build-dependencies
  -> Creating pbuilder-satisfydepends-dummy package
 Package: pbuilder-satisfydepends-dummy
@@ -391,7 +423,7 @@
 Get: 184 http://deb.debian.org/debian bookworm/main armhf sisu-sqlite all 7.2.1-2 [166 kB]
 Get: 185 http://deb.debian.org/debian bookworm/main armhf tree armhf 2.1.0-1 [48.9 kB]
 Get: 186 http://deb.debian.org/debian bookworm/main armhf sisu-complete all 7.2.1-2 [165 kB]
-Fetched 234 MB in 29s (7987 kB/s)
+Fetched 234 MB in 15s (15.7 MB/s)
 debconf: delaying package configuration, since apt-utils is not installed
 (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 ... 17881 files and directories currently installed.)
 Removing locales-all (2.36-9+deb12u3) ...
@@ -1008,8 +1040,8 @@
 Setting up tzdata (2023c-5+deb12u1) ...
 
 Current default time zone: 'Etc/UTC'
-Local time is now:      Mon Jan 15 00:09:39 UTC 2024.
-Universal Time is now:  Mon Jan 15 00:09:39 UTC 2024.
+Local time is now:      Mon Jan 15 01:17:02 UTC 2024.
+Universal Time is now:  Mon Jan 15 01:17:02 UTC 2024.
 Run 'dpkg-reconfigure tzdata' if you wish to change it.
 
 Setting up zip (3.0-13) ...
@@ -1152,7 +1184,7 @@
 selecting dynamic shared memory implementation ... posix
 selecting default max_connections ... 100
 selecting default shared_buffers ... 128MB
-selecting default time zone ... /usr/share/zoneinfo/Etc/GMT+12
+selecting default time zone ... /usr/share/zoneinfo/Etc/GMT-14
 creating configuration files ... ok
 running bootstrap script ... ok
 performing post-bootstrap initialization ... ok
@@ -1251,7 +1283,11 @@
 fakeroot is already the newest version (1.31-1.2).
 0 upgraded, 0 newly installed, 0 to remove and 0 not upgraded.
 I: Building the package
-I: Running cd /build/reproducible-path/live-manual-20151217.2/ && 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  > ../live-manual_20151217.2_source.changes
+I: user script /srv/workspace/pbuilder/14823/tmp/hooks/A99_set_merged_usr starting
+Not re-configuring usrmerge for bookworm
+I: user script /srv/workspace/pbuilder/14823/tmp/hooks/A99_set_merged_usr finished
+hostname: Name or service not known
+I: Running cd /build/reproducible-path/live-manual-20151217.2/ && 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  > ../live-manual_20151217.2_source.changes
 dpkg-buildpackage: info: source package live-manual
 dpkg-buildpackage: info: source version 2:20151217.2
 dpkg-buildpackage: info: source distribution unstable
@@ -1266,7 +1302,7 @@
 make[1]: Entering directory '/build/reproducible-path/live-manual-20151217.2'
 dh_auto_clean
 dh_auto_clean: warning: Compatibility levels before 10 are deprecated (level 9 in use)
-	make -j3 distclean
+	make -j4 distclean
 make[2]: Entering directory '/build/reproducible-path/live-manual-20151217.2'
 rm -rf build
 rm -f manual/en/*~
@@ -1290,8 +1326,8 @@
 localedef -f UTF-8 -i en_US debian/build/locale/en_US.UTF-8
 LOCPATH=/build/reproducible-path/live-manual-20151217.2/debian/build/locale LC_ALL=en_US.UTF-8 dh_auto_build
 dh_auto_build: warning: Compatibility levels before 10 are deprecated (level 9 in use)
-	make -j3
-make[2]: Entering directory '/build/reproducible-path/live-manual-20151217.2'
+	make -j4
+make[2]: ingresso nella directory «/build/reproducible-path/live-manual-20151217.2»
 rm -rf build
 rm -f manual/en/*~
 rm -f manual/po/*/*~
@@ -5376,11 +5412,11 @@
 	  file:///build/reproducible-path/live-manual-20151217.2/build/manual/manifest/live-manual.ro.html
 	[ro] --txt x-www-browser /build/reproducible-path/live-manual-20151217.2/build/manual/txt/live-manual.ro.txt
 	sisu -W [to start ruby web-server on output directory]
-make[2]: Leaving directory '/build/reproducible-path/live-manual-20151217.2'
+make[2]: uscita dalla directory «/build/reproducible-path/live-manual-20151217.2»
 make[1]: Leaving directory '/build/reproducible-path/live-manual-20151217.2'
    dh_auto_test -O--parallel
 dh_auto_test: warning: Compatibility levels before 10 are deprecated (level 9 in use)
-	make -j3 test
+	make -j4 test
 make[1]: Entering directory '/build/reproducible-path/live-manual-20151217.2'
 Checking for syntax errors ....... done!
 Checking for bashisms WARNING: skipping bashism test - you need to install devscripts.
@@ -5396,7 +5432,7 @@
 make[1]: Entering directory '/build/reproducible-path/live-manual-20151217.2'
 dh_auto_install
 dh_auto_install: warning: Compatibility levels before 10 are deprecated (level 9 in use)
-	make -j3 install DESTDIR=/build/reproducible-path/live-manual-20151217.2/debian/tmp AM_UPDATE_INFO_DIR=no
+	make -j4 install DESTDIR=/build/reproducible-path/live-manual-20151217.2/debian/tmp AM_UPDATE_INFO_DIR=no
 make[2]: Entering directory '/build/reproducible-path/live-manual-20151217.2'
 rm -f /build/reproducible-path/live-manual-20151217.2/build/manual/index.html
 mkdir -p /build/reproducible-path/live-manual-20151217.2/debian/tmp/usr/share/doc/live-manual
@@ -5441,9 +5477,9 @@
    debian/rules override_dh_builddeb
 make[1]: Entering directory '/build/reproducible-path/live-manual-20151217.2'
 dh_builddeb -- -Zxz
+dpkg-deb: building package 'live-manual' in '../live-manual_20151217.2_all.deb'.
 dpkg-deb: building package 'live-manual-pdf' in '../live-manual-pdf_20151217.2_all.deb'.
 dpkg-deb: building package 'live-manual-html' in '../live-manual-html_20151217.2_all.deb'.
-dpkg-deb: building package 'live-manual' in '../live-manual_20151217.2_all.deb'.
 dpkg-deb: building package 'live-manual-epub' in '../live-manual-epub_20151217.2_all.deb'.
 dpkg-deb: building package 'live-manual-txt' in '../live-manual-txt_20151217.2_all.deb'.
 dpkg-deb: building package 'live-manual-odf' in '../live-manual-odf_20151217.2_all.deb'.
@@ -5456,12 +5492,14 @@
 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/14823/tmp/hooks/B01_cleanup starting
+I: user script /srv/workspace/pbuilder/14823/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/5264 and its subdirectories
-I: Current time: Sun Jan 14 13:12:50 -12 2024
-I: pbuilder-time-stamp: 1705281170
+I: removing directory /srv/workspace/pbuilder/14823 and its subdirectories
+I: Current time: Mon Jan 15 16:53:47 +14 2024
+I: pbuilder-time-stamp: 1705287227