Diff of the two buildlogs:

--
--- b1/build.log	2023-04-15 05:56:55.209860157 +0000
+++ b2/build.log	2023-04-15 05:59:07.715967387 +0000
@@ -1,6 +1,6 @@
 I: pbuilder: network access will be disabled during build
-I: Current time: Fri Apr 14 17:54:08 -12 2023
-I: pbuilder-time-stamp: 1681538048
+I: Current time: Sat May 18 02:19:57 +14 2024
+I: pbuilder-time-stamp: 1715948397
 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 [./jboss-vfs_3.2.15.Final.orig.tar.gz]
 I: copying [./jboss-vfs_3.2.15.Final-2.debian.tar.xz]
 I: Extracting source
-gpgv: Signature made Sat Dec  5 21:22:46 2020 -12
+gpgv: Signature made Sun Dec  6 23:22:46 2020 +14
 gpgv:                using RSA key 1E0BAAD85C2232A1B3CE92EBB7047105830B9FA1
 gpgv: Can't check signature: No public key
 dpkg-source: warning: cannot verify inline signature for ./jboss-vfs_3.2.15.Final-2.dsc: no acceptable signature found
@@ -25,11 +25,20 @@
 dpkg-source: info: unpacking jboss-vfs_3.2.15.Final-2.debian.tar.xz
 I: using fakeroot in build.
 I: Installing the build-deps
-I: user script /srv/workspace/pbuilder/1398/tmp/hooks/D02_print_environment starting
+I: user script /srv/workspace/pbuilder/796/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/796/tmp/hooks/D01_modify_environment finished
+I: user script /srv/workspace/pbuilder/796/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='1398'
+  PPID='796'
   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.EXiPOGle/pbuilderrc_qFqh --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.EXiPOGle/b1 --logfile b1/build.log jboss-vfs_3.2.15.Final-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.EXiPOGle/pbuilderrc_DHDm --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.EXiPOGle/b2 --logfile b2/build.log --extrapackages usrmerge jboss-vfs_3.2.15.Final-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/1398/tmp/hooks/D02_print_environment finished
+  lrwxrwxrwx 1 root root 7 May 16 07:12 /bin -> usr/bin
+I: user script /srv/workspace/pbuilder/796/tmp/hooks/D02_print_environment finished
  -> Attempting to satisfy build-dependencies
  -> Creating pbuilder-satisfydepends-dummy package
 Package: pbuilder-satisfydepends-dummy
@@ -374,7 +383,7 @@
 Get: 258 http://deb.debian.org/debian bookworm/main arm64 maven all 3.8.7-1 [18.9 kB]
 Get: 259 http://deb.debian.org/debian bookworm/main arm64 maven-repo-helper all 1.11 [142 kB]
 Get: 260 http://deb.debian.org/debian bookworm/main arm64 maven-debian-helper all 2.6.2 [108 kB]
-Fetched 401 MB in 34s (11.8 MB/s)
+Fetched 401 MB in 33s (12.1 MB/s)
 debconf: delaying package configuration, since apt-utils is not installed
 Selecting previously unselected package sgml-base.
 (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.)
@@ -1617,10 +1626,15 @@
 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/jboss-vfs-3.2.15.Final/ && 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  > ../jboss-vfs_3.2.15.Final-2_source.changes
+I: user script /srv/workspace/pbuilder/796/tmp/hooks/A99_set_merged_usr starting
+Re-configuring usrmerge...
+I: user script /srv/workspace/pbuilder/796/tmp/hooks/A99_set_merged_usr finished
+hostname: Temporary failure in name resolution
+I: Running cd /build/jboss-vfs-3.2.15.Final/ && 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  > ../jboss-vfs_3.2.15.Final-2_source.changes
 dpkg-buildpackage: info: source package jboss-vfs
 dpkg-buildpackage: info: source version 3.2.15.Final-2
 dpkg-buildpackage: info: source distribution unstable
@@ -1681,8 +1695,8 @@
 [INFO] ------------------------------------------------------------------------
 [INFO] BUILD SUCCESS
 [INFO] ------------------------------------------------------------------------
-[INFO] Total time:  13.640 s
-[INFO] Finished at: 2023-04-14T17:56:30-12:00
+[INFO] Total time:  8.177 s
+[INFO] Finished at: 2024-05-18T02:21:49+14:00
 [INFO] ------------------------------------------------------------------------
    dh_auto_test
 	/usr/lib/jvm/default-java/bin/java -noverify -cp /usr/share/maven/boot/plexus-classworlds-2.x.jar -Dmaven.home=/usr/share/maven -Dmaven.multiModuleProjectDirectory=/build/jboss-vfs-3.2.15.Final -Dclassworlds.conf=/etc/maven/m2-debian.conf -Dproperties.file.manual=/build/jboss-vfs-3.2.15.Final/debian/maven.properties org.codehaus.plexus.classworlds.launcher.Launcher -s/etc/maven/settings-debian.xml -Ddebian.dir=/build/jboss-vfs-3.2.15.Final/debian -Dmaven.repo.local=/build/jboss-vfs-3.2.15.Final/debian/maven-repo --batch-mode test
@@ -1714,8 +1728,8 @@
 [INFO] ------------------------------------------------------------------------
 [INFO] BUILD SUCCESS
 [INFO] ------------------------------------------------------------------------
-[INFO] Total time:  1.836 s
-[INFO] Finished at: 2023-04-14T17:56:36-12:00
+[INFO] Total time:  1.439 s
+[INFO] Finished at: 2024-05-18T02:21:53+14:00
 [INFO] ------------------------------------------------------------------------
    create-stamp debian/debhelper-build-stamp
  fakeroot debian/rules binary
@@ -1742,8 +1756,8 @@
 [INFO] ------------------------------------------------------------------------
 [INFO] BUILD SUCCESS
 [INFO] ------------------------------------------------------------------------
-[INFO] Total time:  2.861 s
-[INFO] Finished at: 2023-04-14T17:56:42-12:00
+[INFO] Total time:  1.134 s
+[INFO] Finished at: 2024-05-18T02:21:57+14:00
 [INFO] ------------------------------------------------------------------------
 	mh_resolve_dependencies --non-interactive --offline --build -plibjboss-vfs-java --base-directory=/build/jboss-vfs-3.2.15.Final --non-explore
 Analysing pom.xml...
@@ -1768,12 +1782,14 @@
 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/796/tmp/hooks/B01_cleanup starting
+I: user script /srv/workspace/pbuilder/796/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/1398 and its subdirectories
-I: Current time: Fri Apr 14 17:56:54 -12 2023
-I: pbuilder-time-stamp: 1681538214
+I: removing directory /srv/workspace/pbuilder/796 and its subdirectories
+I: Current time: Sat May 18 02:22:06 +14 2024
+I: pbuilder-time-stamp: 1715948526