Diff of the two buildlogs:

--
--- b1/build.log	2023-04-08 12:30:53.773807864 +0000
+++ b2/build.log	2023-04-08 12:32:28.690649550 +0000
@@ -1,6 +1,6 @@
 I: pbuilder: network access will be disabled during build
-I: Current time: Fri May 10 06:52:34 -12 2024
-I: pbuilder-time-stamp: 1715367154
+I: Current time: Sun Apr  9 02:30:57 +14 2023
+I: pbuilder-time-stamp: 1680957057
 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 [./puppet-module-neutron_21.0.0.orig.tar.xz]
 I: copying [./puppet-module-neutron_21.0.0-1.debian.tar.xz]
 I: Extracting source
-gpgv: Signature made Thu Oct 20 09:23:15 2022 -12
+gpgv: Signature made Fri Oct 21 11:23:15 2022 +14
 gpgv:                using RSA key A0B1A9F3508956130E7A425CD416AD15AC6B43FE
 gpgv: Can't check signature: No public key
 dpkg-source: warning: cannot verify inline signature for ./puppet-module-neutron_21.0.0-1.dsc: no acceptable signature found
@@ -25,11 +25,20 @@
 dpkg-source: info: unpacking puppet-module-neutron_21.0.0-1.debian.tar.xz
 I: using fakeroot in build.
 I: Installing the build-deps
-I: user script /srv/workspace/pbuilder/8065/tmp/hooks/D02_print_environment starting
+I: user script /srv/workspace/pbuilder/12581/tmp/hooks/D01_modify_environment starting
+debug: Running on codethink10-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
+lrwxrwxrwx 1 root root 4 Jan  6 03:20 /bin/sh -> dash
+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/12581/tmp/hooks/D01_modify_environment finished
+I: user script /srv/workspace/pbuilder/12581/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'
+  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'
@@ -39,38 +48,38 @@
   IFS=' 	
   '
   LANG='C'
-  LANGUAGE='en_US:en'
+  LANGUAGE='nl_BE:nl'
   LC_ALL='C'
   MAIL='/var/mail/root'
   OPTIND='1'
-  PATH='/usr/sbin:/usr/bin:/sbin:/bin:/usr/games'
+  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'
-  PPID='8065'
+  PPID='12581'
   PS1='# '
   PS2='> '
   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.MYIidYEh/pbuilderrc_dCgn --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.MYIidYEh/b1 --logfile b1/build.log puppet-module-neutron_21.0.0-1.dsc'
+  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.MYIidYEh/pbuilderrc_clXl --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.MYIidYEh/b2 --logfile b2/build.log --extrapackages usrmerge puppet-module-neutron_21.0.0-1.dsc'
   SUDO_GID='117'
   SUDO_UID='110'
   SUDO_USER='jenkins'
   TERM='unknown'
-  TZ='/usr/share/zoneinfo/Etc/GMT+12'
+  TZ='/usr/share/zoneinfo/Etc/GMT-14'
   USER='root'
   USERNAME='root'
   _='/usr/bin/systemd-run'
   http_proxy='http://192.168.101.16:3128'
 I: uname -a
-  Linux codethink15-arm64 4.15.0-208-generic #220-Ubuntu SMP Mon Mar 20 14:28:12 UTC 2023 aarch64 GNU/Linux
+  Linux i-capture-the-hostname 4.15.0-208-generic #220-Ubuntu SMP Mon Mar 20 14:28:12 UTC 2023 aarch64 GNU/Linux
 I: ls -l /bin
-  lrwxrwxrwx 1 root root 7 May  9 04:47 /bin -> usr/bin
-I: user script /srv/workspace/pbuilder/8065/tmp/hooks/D02_print_environment finished
+  lrwxrwxrwx 1 root root 7 Apr  9 00:25 /bin -> usr/bin
+I: user script /srv/workspace/pbuilder/12581/tmp/hooks/D02_print_environment finished
  -> Attempting to satisfy build-dependencies
  -> Creating pbuilder-satisfydepends-dummy package
 Package: pbuilder-satisfydepends-dummy
@@ -170,7 +179,7 @@
 Get: 54 http://deb.debian.org/debian bookworm/main arm64 python3-all arm64 3.11.2-1 [1060 B]
 Get: 55 http://deb.debian.org/debian bookworm/main arm64 python3-six all 1.16.0-4 [17.5 kB]
 Get: 56 http://deb.debian.org/debian bookworm/main arm64 python3-pbr all 5.10.0-2 [61.4 kB]
-Fetched 28.2 MB in 1s (42.9 MB/s)
+Fetched 28.2 MB in 1s (46.6 MB/s)
 debconf: delaying package configuration, since apt-utils is not installed
 Selecting previously unselected package libpython3.11-minimal:arm64.
 (Reading database ... 
(Reading database ... 5%
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(Reading database ... 90%
(Reading database ... 95%
(Reading database ... 100%
(Reading database ... 19616 files and directories currently installed.)
@@ -420,10 +429,15 @@
 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/puppet-module-neutron-21.0.0/ && 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  > ../puppet-module-neutron_21.0.0-1_source.changes
+I: user script /srv/workspace/pbuilder/12581/tmp/hooks/A99_set_merged_usr starting
+Re-configuring usrmerge...
+I: user script /srv/workspace/pbuilder/12581/tmp/hooks/A99_set_merged_usr finished
+hostname: Temporary failure in name resolution
+I: Running cd /build/puppet-module-neutron-21.0.0/ && 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  > ../puppet-module-neutron_21.0.0-1_source.changes
 dpkg-buildpackage: info: source package puppet-module-neutron
 dpkg-buildpackage: info: source version 21.0.0-1
 dpkg-buildpackage: info: source distribution unstable
@@ -577,12 +591,14 @@
 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/12581/tmp/hooks/B01_cleanup starting
+I: user script /srv/workspace/pbuilder/12581/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/8065 and its subdirectories
-I: Current time: Fri May 10 06:53:52 -12 2024
-I: pbuilder-time-stamp: 1715367232
+I: removing directory /srv/workspace/pbuilder/12581 and its subdirectories
+I: Current time: Sun Apr  9 02:32:27 +14 2023
+I: pbuilder-time-stamp: 1680957147