Diff of the two buildlogs:

--
--- b1/build.log	2023-04-13 22:45:52.443245557 +0000
+++ b2/build.log	2023-04-13 22:47:00.060245985 +0000
@@ -1,6 +1,6 @@
 I: pbuilder: network access will be disabled during build
-I: Current time: Thu Apr 13 10:44:49 -12 2023
-I: pbuilder-time-stamp: 1681425889
+I: Current time: Thu May 16 19:08:56 +14 2024
+I: pbuilder-time-stamp: 1715836136
 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 [./libhtml-restrict-perl_3.0.1.orig.tar.gz]
 I: copying [./libhtml-restrict-perl_3.0.1-1.debian.tar.xz]
 I: Extracting source
-gpgv: Signature made Sat Sep 24 01:12:15 2022 -12
+gpgv: Signature made Sun Sep 25 03:12:15 2022 +14
 gpgv:                using RSA key D1E1316E93A760A8104D85FABB3A68018649AA06
 gpgv: Can't check signature: No public key
 dpkg-source: warning: cannot verify inline signature for ./libhtml-restrict-perl_3.0.1-1.dsc: no acceptable signature found
@@ -25,11 +25,20 @@
 dpkg-source: info: unpacking libhtml-restrict-perl_3.0.1-1.debian.tar.xz
 I: Not using root during the build.
 I: Installing the build-deps
-I: user script /srv/workspace/pbuilder/21454/tmp/hooks/D02_print_environment starting
+I: user script /srv/workspace/pbuilder/29016/tmp/hooks/D01_modify_environment starting
+debug: Running on codethink9-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  2023 /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/29016/tmp/hooks/D01_modify_environment finished
+I: user script /srv/workspace/pbuilder/29016/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='21454'
+  PPID='29016'
   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.tyfbpU8f/pbuilderrc_yBwh --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.tyfbpU8f/b1 --logfile b1/build.log libhtml-restrict-perl_3.0.1-1.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.tyfbpU8f/pbuilderrc_tWb3 --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.tyfbpU8f/b2 --logfile b2/build.log --extrapackages usrmerge libhtml-restrict-perl_3.0.1-1.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 codethink10-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 Apr 10 22:26 /bin -> usr/bin
-I: user script /srv/workspace/pbuilder/21454/tmp/hooks/D02_print_environment finished
+  lrwxrwxrwx 1 root root 7 May 15 06:47 /bin -> usr/bin
+I: user script /srv/workspace/pbuilder/29016/tmp/hooks/D02_print_environment finished
  -> Attempting to satisfy build-dependencies
  -> Creating pbuilder-satisfydepends-dummy package
 Package: pbuilder-satisfydepends-dummy
@@ -194,7 +203,7 @@
 Get: 68 http://deb.debian.org/debian bookworm/main arm64 libtest-warn-perl all 0.37-2 [14.5 kB]
 Get: 69 http://deb.debian.org/debian bookworm/main arm64 libtest-most-perl all 0.38-1 [25.1 kB]
 Get: 70 http://deb.debian.org/debian bookworm/main arm64 libtype-tiny-perl all 2.002001-1 [377 kB]
-Fetched 19.7 MB in 2s (12.3 MB/s)
+Fetched 19.7 MB in 1s (27.5 MB/s)
 debconf: delaying package configuration, since apt-utils is not installed
 Selecting previously unselected package sensible-utils.
 (Reading database ... 
(Reading database ... 5%
(Reading database ... 10%
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(Reading database ... 60%
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(Reading database ... 80%
(Reading database ... 85%
(Reading database ... 90%
(Reading database ... 95%
(Reading database ... 100%
(Reading database ... 19616 files and directories currently installed.)
@@ -488,8 +497,17 @@
 Writing extended state information...
 Building tag database...
  -> Finished parsing the build-deps
+Reading package lists...
+Building dependency tree...
+Reading state information...
+usrmerge is already the newest version (35).
+0 upgraded, 0 newly installed, 0 to remove and 0 not upgraded.
 I: Building the package
-I: Running cd /build/libhtml-restrict-perl-3.0.1/ && 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  > ../libhtml-restrict-perl_3.0.1-1_source.changes
+I: user script /srv/workspace/pbuilder/29016/tmp/hooks/A99_set_merged_usr starting
+Re-configuring usrmerge...
+I: user script /srv/workspace/pbuilder/29016/tmp/hooks/A99_set_merged_usr finished
+hostname: Temporary failure in name resolution
+I: Running cd /build/libhtml-restrict-perl-3.0.1/ && 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  > ../libhtml-restrict-perl_3.0.1-1_source.changes
 dpkg-buildpackage: info: source package libhtml-restrict-perl
 dpkg-buildpackage: info: source version 3.0.1-1
 dpkg-buildpackage: info: source distribution unstable
@@ -937,7 +955,7 @@
 1..7
 ok
 All tests successful.
-Files=18, Tests=116, 13 wallclock secs ( 0.22 usr  0.05 sys + 10.76 cusr  1.02 csys = 12.05 CPU)
+Files=18, Tests=116, 12 wallclock secs ( 0.21 usr  0.05 sys + 10.42 cusr  0.93 csys = 11.61 CPU)
 Result: PASS
 make[1]: Leaving directory '/build/libhtml-restrict-perl-3.0.1'
    create-stamp debian/debhelper-build-stamp
@@ -975,12 +993,14 @@
 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/29016/tmp/hooks/B01_cleanup starting
+I: user script /srv/workspace/pbuilder/29016/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/21454 and its subdirectories
-I: Current time: Thu Apr 13 10:45:51 -12 2023
-I: pbuilder-time-stamp: 1681425951
+I: removing directory /srv/workspace/pbuilder/29016 and its subdirectories
+I: Current time: Thu May 16 19:09:58 +14 2024
+I: pbuilder-time-stamp: 1715836198