Diff of the two buildlogs:

--
--- b1/build.log	2023-04-26 15:30:10.527667983 +0000
+++ b2/build.log	2023-04-26 15:34:57.546930369 +0000
@@ -1,6 +1,6 @@
 I: pbuilder: network access will be disabled during build
-I: Current time: Tue May 28 09:50:41 -12 2024
-I: pbuilder-time-stamp: 1716933041
+I: Current time: Thu Apr 27 05:30:15 +14 2023
+I: pbuilder-time-stamp: 1682523015
 I: Building the build Environment
 I: extracting base tarball [/var/cache/pbuilder/bookworm-reproducible-base.tgz]
 I: copying local configuration
@@ -16,7 +16,7 @@
 I: copying [./qspeakers_1.6.7.orig.tar.gz]
 I: copying [./qspeakers_1.6.7-1.debian.tar.xz]
 I: Extracting source
-gpgv: Signature made Wed Feb  1 06:14:52 2023 -12
+gpgv: Signature made Thu Feb  2 08:14:52 2023 +14
 gpgv:                using RSA key 3340B364FF67153FB7CCAE851C2816907136AE39
 gpgv: Can't check signature: No public key
 dpkg-source: warning: cannot verify inline signature for ./qspeakers_1.6.7-1.dsc: no acceptable signature found
@@ -25,52 +25,84 @@
 dpkg-source: info: unpacking qspeakers_1.6.7-1.debian.tar.xz
 I: using fakeroot in build.
 I: Installing the build-deps
-I: user script /srv/workspace/pbuilder/18779/tmp/hooks/D02_print_environment starting
+I: user script /srv/workspace/pbuilder/27995/tmp/hooks/D01_modify_environment starting
+debug: Running on codethink16-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 Apr 27 05:30 /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/27995/tmp/hooks/D01_modify_environment finished
+I: user script /srv/workspace/pbuilder/27995/tmp/hooks/D02_print_environment starting
 I: set
-  BUILDDIR='/build'
-  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]="15" [3]="1" [4]="release" [5]="aarch64-unknown-linux-gnu")
+  BASH_VERSION='5.2.15(1)-release'
+  BUILDDIR=/build
+  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=8'
-  DISTRIBUTION='bookworm'
-  HOME='/var/lib/jenkins'
-  HOST_ARCH='arm64'
+  DIRSTACK=()
+  DISTRIBUTION=bookworm
+  EUID=0
+  FUNCNAME=([0]="Echo" [1]="main")
+  GROUPS=()
+  HOME=/var/lib/jenkins
+  HOSTNAME=i-capture-the-hostname
+  HOSTTYPE=aarch64
+  HOST_ARCH=arm64
   IFS=' 	
   '
-  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='18779'
-  PS1='# '
-  PS2='> '
+  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=27995
   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.qcXlX0nT/pbuilderrc_7tTb --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.qcXlX0nT/b1 --logfile b1/build.log qspeakers_1.6.7-1.dsc'
-  SUDO_GID='117'
-  SUDO_UID='110'
-  SUDO_USER='jenkins'
-  TERM='unknown'
-  TZ='/usr/share/zoneinfo/Etc/GMT+12'
-  USER='root'
-  USERNAME='root'
-  _='/usr/bin/systemd-run'
-  http_proxy='http://192.168.101.16:3128'
+  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.qcXlX0nT/pbuilderrc_tT0u --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.qcXlX0nT/b2 --logfile b2/build.log --extrapackages usrmerge qspeakers_1.6.7-1.dsc'
+  SUDO_GID=117
+  SUDO_UID=110
+  SUDO_USER=jenkins
+  TERM=unknown
+  TZ=/usr/share/zoneinfo/Etc/GMT-14
+  UID=0
+  USER=root
+  USERNAME=root
+  _='I: set'
+  http_proxy=http://192.168.101.16:3128
 I: uname -a
-  Linux codethink11-arm64 4.15.0-209-generic #220-Ubuntu SMP Tue Mar 21 19:52:44 UTC 2023 aarch64 GNU/Linux
+  Linux i-capture-the-hostname 4.15.0-209-generic #220-Ubuntu SMP Tue Mar 21 19:52:44 UTC 2023 aarch64 GNU/Linux
 I: ls -l /bin
-  lrwxrwxrwx 1 root root 7 May 24 04:47 /bin -> usr/bin
-I: user script /srv/workspace/pbuilder/18779/tmp/hooks/D02_print_environment finished
+  lrwxrwxrwx 1 root root 7 Apr 27 00:25 /bin -> usr/bin
+I: user script /srv/workspace/pbuilder/27995/tmp/hooks/D02_print_environment finished
  -> Attempting to satisfy build-dependencies
  -> Creating pbuilder-satisfydepends-dummy package
 Package: pbuilder-satisfydepends-dummy
@@ -304,7 +336,7 @@
 Get: 188 http://deb.debian.org/debian bookworm/main arm64 qt5-assistant arm64 5.15.8-2 [347 kB]
 Get: 189 http://deb.debian.org/debian bookworm/main arm64 qtattributionsscanner-qt5 arm64 5.15.8-2 [30.1 kB]
 Get: 190 http://deb.debian.org/debian bookworm/main arm64 qttools5-dev-tools arm64 5.15.8-2 [1001 kB]
-Fetched 136 MB in 3s (49.9 MB/s)
+Fetched 136 MB in 2s (56.2 MB/s)
 debconf: delaying package configuration, since apt-utils is not installed
 Selecting previously unselected package libglib2.0-0:arm64.
 (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 ... 19616 files and directories currently installed.)
@@ -1088,10 +1120,15 @@
 Reading package lists...
 Building dependency tree...
 Reading state information...
+usrmerge is already the newest version (35).
 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/qspeakers-1.6.7/ && 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  > ../qspeakers_1.6.7-1_source.changes
+I: user script /srv/workspace/pbuilder/27995/tmp/hooks/A99_set_merged_usr starting
+Re-configuring usrmerge...
+I: user script /srv/workspace/pbuilder/27995/tmp/hooks/A99_set_merged_usr finished
+hostname: Temporary failure in name resolution
+I: Running cd /build/qspeakers-1.6.7/ && 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  > ../qspeakers_1.6.7-1_source.changes
 dpkg-buildpackage: info: source package qspeakers
 dpkg-buildpackage: info: source version 1.6.7-1
 dpkg-buildpackage: info: source distribution unstable
@@ -1116,15 +1153,15 @@
 /usr/lib/qt5/bin/lrelease qspeakers_fr.ts -qm locale/qspeakers_fr.qm
 gzip --to-stdout qspeakers.1 > qspeakers.1.gz
 /usr/lib/qt5/bin/uic mainwindow.ui -o ui_mainwindow.h
-/usr/lib/qt5/bin/uic speakerdialog.ui -o ui_speakerdialog.h
-/usr/lib/qt5/bin/uic listdialog.ui -o ui_listdialog.h
-/usr/lib/qt5/bin/uic searchdialog.ui -o ui_searchdialog.h
-Updating 'locale/qspeakers_fr.qm'...
 Updating 'locale/qspeakers_en.qm'...
     Generated 0 translation(s) (0 finished and 0 unfinished)
     Ignored 166 untranslated source text(s)
+/usr/lib/qt5/bin/uic speakerdialog.ui -o ui_speakerdialog.h
+Updating 'locale/qspeakers_fr.qm'...
     Generated 164 translation(s) (164 finished and 0 unfinished)
     Ignored 2 untranslated source text(s)
+/usr/lib/qt5/bin/uic listdialog.ui -o ui_listdialog.h
+/usr/lib/qt5/bin/uic searchdialog.ui -o ui_searchdialog.h
 /usr/lib/qt5/bin/uic bandpassdialog.ui -o ui_bandpassdialog.h
 g++ -c -pipe -g -O2 -ffile-prefix-map=/build/qspeakers-1.6.7=. -fstack-protector-strong -Wformat -Werror=format-security -Wdate-time -D_FORTIFY_SOURCE=2 -std=gnu++11 -Wall -Wextra -D_REENTRANT -fPIC -DQT_NO_DEBUG_OUTPUT -DQT_NO_DEBUG -DQT_PRINTSUPPORT_LIB -DQT_CHARTS_LIB -DQT_WIDGETS_LIB -DQT_GUI_LIB -DQT_XML_LIB -DQT_CORE_LIB -I. -I/usr/include/aarch64-linux-gnu/qt5 -I/usr/include/aarch64-linux-gnu/qt5/QtPrintSupport -I/usr/include/aarch64-linux-gnu/qt5/QtCharts -I/usr/include/aarch64-linux-gnu/qt5/QtWidgets -I/usr/include/aarch64-linux-gnu/qt5/QtGui -I/usr/include/aarch64-linux-gnu/qt5/QtXml -I/usr/include/aarch64-linux-gnu/qt5/QtCore -I. -I. -I/usr/lib/aarch64-linux-gnu/qt5/mkspecs/linux-g++ -o main.o main.cpp
 g++ -c -pipe -g -O2 -ffile-prefix-map=/build/qspeakers-1.6.7=. -fstack-protector-strong -Wformat -Werror=format-security -Wdate-time -D_FORTIFY_SOURCE=2 -std=gnu++11 -Wall -Wextra -D_REENTRANT -fPIC -DQT_NO_DEBUG_OUTPUT -DQT_NO_DEBUG -DQT_PRINTSUPPORT_LIB -DQT_CHARTS_LIB -DQT_WIDGETS_LIB -DQT_GUI_LIB -DQT_XML_LIB -DQT_CORE_LIB -I. -I/usr/include/aarch64-linux-gnu/qt5 -I/usr/include/aarch64-linux-gnu/qt5/QtPrintSupport -I/usr/include/aarch64-linux-gnu/qt5/QtCharts -I/usr/include/aarch64-linux-gnu/qt5/QtWidgets -I/usr/include/aarch64-linux-gnu/qt5/QtGui -I/usr/include/aarch64-linux-gnu/qt5/QtXml -I/usr/include/aarch64-linux-gnu/qt5/QtCore -I. -I. -I/usr/lib/aarch64-linux-gnu/qt5/mkspecs/linux-g++ -o speakerdialog.o speakerdialog.cpp
@@ -1166,17 +1203,17 @@
    dh_auto_install --destdir=debian/qspeakers/
 	make -j8 install DESTDIR=/build/qspeakers-1.6.7/debian/qspeakers AM_UPDATE_INFO_DIR=no INSTALL_ROOT=/build/qspeakers-1.6.7/debian/qspeakers
 make[1]: Entering directory '/build/qspeakers-1.6.7'
-/usr/lib/qt5/bin/qmake -install qinstall /build/qspeakers-1.6.7/qspeakers.1.gz /build/qspeakers-1.6.7/debian/qspeakers/usr/share/man/man1/qspeakers.1.gz
-/usr/lib/qt5/bin/qmake -install qinstall /build/qspeakers-1.6.7/qspeakers.svg /build/qspeakers-1.6.7/debian/qspeakers/usr/share/icons/hicolor/scalable/apps/qspeakers.svg
 /usr/lib/qt5/bin/qmake -install qinstall -exe qspeakers /build/qspeakers-1.6.7/debian/qspeakers/usr/bin/qspeakers
-/usr/lib/qt5/bin/qmake -install qinstall /build/qspeakers-1.6.7/qspeakers_db.xml /build/qspeakers-1.6.7/debian/qspeakers/usr/share/qspeakers/qspeakers_db.xml
+/usr/lib/qt5/bin/qmake -install qinstall /build/qspeakers-1.6.7/qspeakers.svg /build/qspeakers-1.6.7/debian/qspeakers/usr/share/icons/hicolor/scalable/apps/qspeakers.svg
+/usr/lib/qt5/bin/qmake -install qinstall /build/qspeakers-1.6.7/qspeakers.1.gz /build/qspeakers-1.6.7/debian/qspeakers/usr/share/man/man1/qspeakers.1.gz
 /usr/lib/qt5/bin/qmake -install qinstall /build/qspeakers-1.6.7/locale /build/qspeakers-1.6.7/debian/qspeakers/usr/share/qspeakers/locale
-: /build/qspeakers-1.6.7/debian/qspeakers/usr/bin/qspeakers
+/usr/lib/qt5/bin/qmake -install qinstall /build/qspeakers-1.6.7/qspeakers_db.xml /build/qspeakers-1.6.7/debian/qspeakers/usr/share/qspeakers/qspeakers_db.xml
 /usr/lib/qt5/bin/qmake -install qinstall /build/qspeakers-1.6.7/application-x-qspeakers.xml /build/qspeakers-1.6.7/debian/qspeakers/usr/share/mime/packages/application-x-qspeakers.xml
 /usr/lib/qt5/bin/qmake -install qinstall /build/qspeakers-1.6.7/qspeakers.desktop /build/qspeakers-1.6.7/debian/qspeakers/usr/share/applications/qspeakers.desktop
+: /build/qspeakers-1.6.7/debian/qspeakers/usr/bin/qspeakers
 /usr/lib/qt5/bin/qmake -install qinstall /build/qspeakers-1.6.7/sealedbox_template.scad /build/qspeakers-1.6.7/debian/qspeakers/usr/share/qspeakers/sealedbox_template.scad
-/usr/lib/qt5/bin/qmake -install qinstall /build/qspeakers-1.6.7/fr.free.brouits.qspeakers.metainfo.xml /build/qspeakers-1.6.7/debian/qspeakers/usr/share/metainfo/fr.free.brouits.qspeakers.metainfo.xml
 /usr/lib/qt5/bin/qmake -install qinstall /build/qspeakers-1.6.7/portedbox_template.scad /build/qspeakers-1.6.7/debian/qspeakers/usr/share/qspeakers/portedbox_template.scad
+/usr/lib/qt5/bin/qmake -install qinstall /build/qspeakers-1.6.7/fr.free.brouits.qspeakers.metainfo.xml /build/qspeakers-1.6.7/debian/qspeakers/usr/share/metainfo/fr.free.brouits.qspeakers.metainfo.xml
 /usr/lib/qt5/bin/qmake -install qinstall /build/qspeakers-1.6.7/bandpassbox_template.scad /build/qspeakers-1.6.7/debian/qspeakers/usr/share/qspeakers/bandpassbox_template.scad
 /usr/lib/qt5/bin/qmake -install qinstall /build/qspeakers-1.6.7/sealedbox_cutting_template.scad /build/qspeakers-1.6.7/debian/qspeakers/usr/share/qspeakers/sealedbox_cutting_template.scad
 /usr/lib/qt5/bin/qmake -install qinstall /build/qspeakers-1.6.7/portedbox_cutting_template.scad /build/qspeakers-1.6.7/debian/qspeakers/usr/share/qspeakers/portedbox_cutting_template.scad
@@ -1209,12 +1246,14 @@
 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/27995/tmp/hooks/B01_cleanup starting
+I: user script /srv/workspace/pbuilder/27995/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/18779 and its subdirectories
-I: Current time: Tue May 28 09:53:09 -12 2024
-I: pbuilder-time-stamp: 1716933189
+I: removing directory /srv/workspace/pbuilder/27995 and its subdirectories
+I: Current time: Thu Apr 27 05:34:56 +14 2023
+I: pbuilder-time-stamp: 1682523296