Diff of the two buildlogs:

--
--- b1/build.log	2023-04-12 13:15:16.099365143 +0000
+++ b2/build.log	2023-04-12 13:19:55.025019521 +0000
@@ -1,6 +1,6 @@
 I: pbuilder: network access will be disabled during build
-I: Current time: Wed Apr 12 01:11:38 -12 2023
-I: pbuilder-time-stamp: 1681305098
+I: Current time: Wed May 15 09:38:19 +14 2024
+I: pbuilder-time-stamp: 1715715499
 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 [./libjackson-json-java_1.9.13.orig.tar.xz]
 I: copying [./libjackson-json-java_1.9.13-2.debian.tar.xz]
 I: Extracting source
-gpgv: Signature made Sat Sep 19 07:44:20 2020 -12
+gpgv: Signature made Sun Sep 20 09:44:20 2020 +14
 gpgv:                using RSA key B8340990283D8D9BC1949AC74799A35146D12B35
 gpgv: Can't check signature: No public key
 dpkg-source: warning: cannot verify inline signature for ./libjackson-json-java_1.9.13-2.dsc: no acceptable signature found
@@ -33,11 +33,20 @@
 dpkg-source: info: applying 0006-Backport-all-known-security-fixes-from-2.x-that-were.patch
 I: using fakeroot in build.
 I: Installing the build-deps
-I: user script /srv/workspace/pbuilder/13080/tmp/hooks/D02_print_environment starting
+I: user script /srv/workspace/pbuilder/29610/tmp/hooks/D01_modify_environment starting
+debug: Running on codethink15-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/29610/tmp/hooks/D01_modify_environment finished
+I: user script /srv/workspace/pbuilder/29610/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'
@@ -47,38 +56,38 @@
   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='13080'
+  PPID='29610'
   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.3GJmGqPV/pbuilderrc_6zTj --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.3GJmGqPV/b1 --logfile b1/build.log libjackson-json-java_1.9.13-2.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.3GJmGqPV/pbuilderrc_tKZv --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.3GJmGqPV/b2 --logfile b2/build.log --extrapackages usrmerge libjackson-json-java_1.9.13-2.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 codethink12-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 11 22:25 /bin -> usr/bin
-I: user script /srv/workspace/pbuilder/13080/tmp/hooks/D02_print_environment finished
+  lrwxrwxrwx 1 root root 7 May 13 06:47 /bin -> usr/bin
+I: user script /srv/workspace/pbuilder/29610/tmp/hooks/D02_print_environment finished
  -> Attempting to satisfy build-dependencies
  -> Creating pbuilder-satisfydepends-dummy package
 Package: pbuilder-satisfydepends-dummy
@@ -437,7 +446,7 @@
 Get: 295 http://deb.debian.org/debian bookworm/main arm64 libjoda-time-java all 2.10.14-1 [539 kB]
 Get: 296 http://deb.debian.org/debian bookworm/main arm64 libnet-luminis-build-plugin-java all 0.2.0-6 [7364 B]
 Get: 297 http://deb.debian.org/debian bookworm/main arm64 maven-repo-helper all 1.11 [142 kB]
-Fetched 409 MB in 33s (12.4 MB/s)
+Fetched 409 MB in 31s (13.1 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 ... 95%
(Reading database ... 100%
(Reading database ... 19616 files and directories currently installed.)
@@ -1828,10 +1837,15 @@
 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/libjackson-json-java-1.9.13/ && 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  > ../libjackson-json-java_1.9.13-2_source.changes
+I: user script /srv/workspace/pbuilder/29610/tmp/hooks/A99_set_merged_usr starting
+Re-configuring usrmerge...
+I: user script /srv/workspace/pbuilder/29610/tmp/hooks/A99_set_merged_usr finished
+hostname: Temporary failure in name resolution
+I: Running cd /build/libjackson-json-java-1.9.13/ && 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  > ../libjackson-json-java_1.9.13-2_source.changes
 dpkg-buildpackage: info: source package libjackson-json-java
 dpkg-buildpackage: info: source version 1.9.13-2
 dpkg-buildpackage: info: source distribution unstable
@@ -3571,7 +3585,7 @@
      [copy] Copying 8 files to /build/libjackson-json-java-1.9.13/dist
 
 BUILD SUCCESSFUL
-Total time: 1 minute 5 seconds
+Total time: 1 minute 26 seconds
 make[1]: Leaving directory '/build/libjackson-json-java-1.9.13'
    dh_auto_test
    create-stamp debian/debhelper-build-stamp
@@ -3598,8 +3612,8 @@
    dh_gencontrol
    dh_md5sums
    dh_builddeb
-dpkg-deb: building package 'libjackson-json-java-doc' in '../libjackson-json-java-doc_1.9.13-2_all.deb'.
 dpkg-deb: building package 'libjackson-json-java' in '../libjackson-json-java_1.9.13-2_all.deb'.
+dpkg-deb: building package 'libjackson-json-java-doc' in '../libjackson-json-java-doc_1.9.13-2_all.deb'.
  dpkg-genbuildinfo --build=binary -O../libjackson-json-java_1.9.13-2_arm64.buildinfo
  dpkg-genchanges --build=binary -O../libjackson-json-java_1.9.13-2_arm64.changes
 dpkg-genchanges: info: binary-only upload (no source code included)
@@ -3607,12 +3621,14 @@
 dpkg-buildpackage: info: binary-only upload (no source included)
 dpkg-genchanges: info: not including original source code in upload
 I: copying local configuration
+I: user script /srv/workspace/pbuilder/29610/tmp/hooks/B01_cleanup starting
+I: user script /srv/workspace/pbuilder/29610/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/13080 and its subdirectories
-I: Current time: Wed Apr 12 01:15:14 -12 2023
-I: pbuilder-time-stamp: 1681305314
+I: removing directory /srv/workspace/pbuilder/29610 and its subdirectories
+I: Current time: Wed May 15 09:42:54 +14 2024
+I: pbuilder-time-stamp: 1715715774