Diff of the two buildlogs:

--
--- b1/build.log	2024-01-10 17:13:12.467781715 +0000
+++ b2/build.log	2024-01-10 17:29:19.242861319 +0000
@@ -1,6 +1,6 @@
 I: pbuilder: network access will be disabled during build
-I: Current time: Wed Jan 10 05:07:43 -12 2024
-I: pbuilder-time-stamp: 1704906463
+I: Current time: Thu Jan 11 07:14:48 +14 2024
+I: pbuilder-time-stamp: 1704906888
 I: Building the build Environment
 I: extracting base tarball [/var/cache/pbuilder/bullseye-reproducible-base.tgz]
 I: copying local configuration
@@ -17,7 +17,7 @@
 I: copying [./eric_21.1+ds1-1.debian.tar.xz]
 I: Extracting source
 gpgv: unknown type of key resource 'trustedkeys.kbx'
-gpgv: keyblock resource '/tmp/dpkg-verify-sig.wgvlnwof/trustedkeys.kbx': General error
+gpgv: keyblock resource '/tmp/dpkg-verify-sig.npl7_gWH/trustedkeys.kbx': General error
 gpgv: Signature made Sat Jan  2 17:11:04 2021 
 gpgv:                using RSA key 7E7729476D87D6F11D91ACCBC293E7B461825ACE
 gpgv: Can't check signature: No public key
@@ -33,49 +33,80 @@
 dpkg-source: info: applying 08_fix_asttokens_import.patch
 I: Not using root during the build.
 I: Installing the build-deps
-I: user script /srv/workspace/pbuilder/19437/tmp/hooks/D02_print_environment starting
+I: user script /srv/workspace/pbuilder/20193/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 10 17:15 /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/20193/tmp/hooks/D01_modify_environment finished
+I: user script /srv/workspace/pbuilder/20193/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,-fixfilepath parallel=3 '
-  DISTRIBUTION='bullseye'
-  HOME='/root'
-  HOST_ARCH='armhf'
+  BASH=/bin/sh
+  BASHOPTS=checkwinsize:cmdhist:complete_fullquote:extquote:force_fignore:globasciiranges:hostcomplete:interactive_comments:progcomp:promptvars:sourcepath
+  BASH_ALIASES=()
+  BASH_ARGC=()
+  BASH_ARGV=()
+  BASH_CMDS=()
+  BASH_LINENO=([0]="12" [1]="0")
+  BASH_SOURCE=([0]="/tmp/hooks/D02_print_environment" [1]="/tmp/hooks/D02_print_environment")
+  BASH_VERSINFO=([0]="5" [1]="1" [2]="4" [3]="1" [4]="release" [5]="arm-unknown-linux-gnueabihf")
+  BASH_VERSION='5.1.4(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,-fixfilepath parallel=4 '
+  DIRSTACK=()
+  DISTRIBUTION=bullseye
+  EUID=0
+  FUNCNAME=([0]="Echo" [1]="main")
+  GROUPS=()
+  HOME=/root
+  HOSTNAME=i-capture-the-hostname
+  HOSTTYPE=arm
+  HOST_ARCH=armhf
   IFS=' 	
   '
-  INVOCATION_ID='30c619ba448844f5bb386800e2b327a8'
-  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='19437'
-  PS1='# '
-  PS2='> '
+  INVOCATION_ID=13b96dd9f46946ad967f8e8c7cef8892
+  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=20193
   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.Dy0zv5qv/pbuilderrc_XNLz --distribution bullseye --hookdir /etc/pbuilder/first-build-hooks --debbuildopts -b --basetgz /var/cache/pbuilder/bullseye-reproducible-base.tgz --buildresult /srv/reproducible-results/rbuild-debian/r-b-build.Dy0zv5qv/b1 --logfile b1/build.log eric_21.1+ds1-1.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.Dy0zv5qv/pbuilderrc_7EU0 --distribution bullseye --hookdir /etc/pbuilder/rebuild-hooks --debbuildopts -b --basetgz /var/cache/pbuilder/bullseye-reproducible-base.tgz --buildresult /srv/reproducible-results/rbuild-debian/r-b-build.Dy0zv5qv/b2 --logfile b2/build.log eric_21.1+ds1-1.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 virt32c 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 3580
   -rwxr-xr-x 1 root root 816764 Mar 27  2022 bash
@@ -135,7 +166,7 @@
   -rwxr-xr-x 1 root root  30732 Sep 22  2020 rmdir
   -rwxr-xr-x 1 root root  14144 Sep 27  2020 run-parts
   -rwxr-xr-x 1 root root  76012 Dec 22  2018 sed
-  lrwxrwxrwx 1 root root      4 Jan  7 09:26 sh -> dash
+  lrwxrwxrwx 1 root root      9 Jan 10 17:15 sh -> /bin/bash
   -rwxr-xr-x 1 root root  22532 Sep 22  2020 sleep
   -rwxr-xr-x 1 root root  55360 Sep 22  2020 stty
   -rwsr-xr-x 1 root root  46704 Jan 20  2022 su
@@ -161,7 +192,7 @@
   -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/19437/tmp/hooks/D02_print_environment finished
+I: user script /srv/workspace/pbuilder/20193/tmp/hooks/D02_print_environment finished
  -> Attempting to satisfy build-dependencies
  -> Creating pbuilder-satisfydepends-dummy package
 Package: pbuilder-satisfydepends-dummy
@@ -392,7 +423,7 @@
 Get: 179 http://deb.debian.org/debian bullseye/main armhf qt5-assistant armhf 5.15.2-5 [336 kB]
 Get: 180 http://deb.debian.org/debian bullseye/main armhf qtattributionsscanner-qt5 armhf 5.15.2-5 [36.1 kB]
 Get: 181 http://deb.debian.org/debian bullseye/main armhf qttools5-dev-tools armhf 5.15.2-5 [913 kB]
-Fetched 106 MB in 3s (33.4 MB/s)
+Fetched 106 MB in 7s (16.0 MB/s)
 debconf: delaying package configuration, since apt-utils is not installed
 Selecting previously unselected package bsdextrautils.
 (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 ... 17486 files and directories currently installed.)
@@ -978,8 +1009,8 @@
 Setting up tzdata (2021a-1+deb11u10) ...
 
 Current default time zone: 'Etc/UTC'
-Local time is now:      Wed Jan 10 17:10:22 UTC 2024.
-Universal Time is now:  Wed Jan 10 17:10:22 UTC 2024.
+Local time is now:      Wed Jan 10 17:20:33 UTC 2024.
+Universal Time is now:  Wed Jan 10 17:20:33 UTC 2024.
 Run 'dpkg-reconfigure tzdata' if you wish to change it.
 
 Setting up libcap2-bin (1:2.44-1) ...
@@ -1146,7 +1177,11 @@
 Building tag database...
  -> Finished parsing the build-deps
 I: Building the package
-I: Running cd /build/reproducible-path/eric-21.1+ds1/ && 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  > ../eric_21.1+ds1-1_source.changes
+I: user script /srv/workspace/pbuilder/20193/tmp/hooks/A99_set_merged_usr starting
+Not re-configuring usrmerge for bullseye
+I: user script /srv/workspace/pbuilder/20193/tmp/hooks/A99_set_merged_usr finished
+hostname: Name or service not known
+I: Running cd /build/reproducible-path/eric-21.1+ds1/ && 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  > ../eric_21.1+ds1-1_source.changes
 dpkg-buildpackage: info: source package eric
 dpkg-buildpackage: info: source version 21.1+ds1-1
 dpkg-buildpackage: info: source distribution unstable
@@ -1263,8 +1298,8 @@
    dh_gencontrol
    dh_md5sums
    dh_builddeb
-dpkg-deb: building package 'eric' in '../eric_21.1+ds1-1_all.deb'.
 dpkg-deb: building package 'eric-api-files' in '../eric-api-files_21.1+ds1-1_all.deb'.
+dpkg-deb: building package 'eric' in '../eric_21.1+ds1-1_all.deb'.
  dpkg-genbuildinfo --build=binary
  dpkg-genchanges --build=binary >../eric_21.1+ds1-1_armhf.changes
 dpkg-genchanges: info: binary-only upload (no source code included)
@@ -1272,12 +1307,14 @@
 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/20193/tmp/hooks/B01_cleanup starting
+I: user script /srv/workspace/pbuilder/20193/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/19437 and its subdirectories
-I: Current time: Wed Jan 10 05:13:08 -12 2024
-I: pbuilder-time-stamp: 1704906788
+I: removing directory /srv/workspace/pbuilder/20193 and its subdirectories
+I: Current time: Thu Jan 11 07:29:09 +14 2024
+I: pbuilder-time-stamp: 1704907749