Diff of the two buildlogs:

--
--- b1/build.log	2023-04-15 03:20:53.265836726 +0000
+++ b2/build.log	2023-04-15 03:24:15.972833283 +0000
@@ -1,6 +1,6 @@
 I: pbuilder: network access will be disabled during build
-I: Current time: Fri Apr 14 15:18:00 -12 2023
-I: pbuilder-time-stamp: 1681528680
+I: Current time: Fri May 17 23:43:56 +14 2024
+I: pbuilder-time-stamp: 1715939036
 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 [./felix-main_5.0.0.orig.tar.xz]
 I: copying [./felix-main_5.0.0-5.debian.tar.xz]
 I: Extracting source
-gpgv: Signature made Sun Jul  2 10:09:36 2017 -12
+gpgv: Signature made Mon Jul  3 12:09:36 2017 +14
 gpgv:                using RSA key B8CE4DE21080DCF903E16C40F513C419E4B9D0AC
 gpgv:                issuer "ebourg@apache.org"
 gpgv: Can't check signature: No public key
@@ -28,11 +28,20 @@
 dpkg-source: info: applying default_usr_locations.diff
 I: using fakeroot in build.
 I: Installing the build-deps
-I: user script /srv/workspace/pbuilder/9138/tmp/hooks/D02_print_environment starting
+I: user script /srv/workspace/pbuilder/27017/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/27017/tmp/hooks/D01_modify_environment finished
+I: user script /srv/workspace/pbuilder/27017/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'
@@ -42,38 +51,38 @@
   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='9138'
+  PPID='27017'
   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.fnArL1DZ/pbuilderrc_78vw --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.fnArL1DZ/b1 --logfile b1/build.log felix-main_5.0.0-5.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.fnArL1DZ/pbuilderrc_4fs2 --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.fnArL1DZ/b2 --logfile b2/build.log --extrapackages usrmerge felix-main_5.0.0-5.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 codethink14-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 12 22:50 /bin -> usr/bin
-I: user script /srv/workspace/pbuilder/9138/tmp/hooks/D02_print_environment finished
+  lrwxrwxrwx 1 root root 7 May 15 06:47 /bin -> usr/bin
+I: user script /srv/workspace/pbuilder/27017/tmp/hooks/D02_print_environment finished
  -> Attempting to satisfy build-dependencies
  -> Creating pbuilder-satisfydepends-dummy package
 Package: pbuilder-satisfydepends-dummy
@@ -445,7 +454,7 @@
 Get: 298 http://deb.debian.org/debian bookworm/main arm64 maven all 3.8.7-1 [18.9 kB]
 Get: 299 http://deb.debian.org/debian bookworm/main arm64 maven-repo-helper all 1.11 [142 kB]
 Get: 300 http://deb.debian.org/debian bookworm/main arm64 maven-debian-helper all 2.6.2 [108 kB]
-Fetched 430 MB in 34s (12.7 MB/s)
+Fetched 430 MB in 1min 7s (6417 kB/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.)
@@ -1848,10 +1857,15 @@
 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/felix-main-5.0.0/ && 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  > ../felix-main_5.0.0-5_source.changes
+I: user script /srv/workspace/pbuilder/27017/tmp/hooks/A99_set_merged_usr starting
+Re-configuring usrmerge...
+I: user script /srv/workspace/pbuilder/27017/tmp/hooks/A99_set_merged_usr finished
+hostname: Temporary failure in name resolution
+I: Running cd /build/felix-main-5.0.0/ && 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  > ../felix-main_5.0.0-5_source.changes
 dpkg-buildpackage: info: source package felix-main
 dpkg-buildpackage: info: source version 5.0.0-5
 dpkg-buildpackage: info: source distribution unstable
@@ -1974,8 +1988,8 @@
 [INFO] ------------------------------------------------------------------------
 [INFO] BUILD SUCCESS
 [INFO] ------------------------------------------------------------------------
-[INFO] Total time:  18.934 s
-[INFO] Finished at: 2023-04-14T15:20:08-12:00
+[INFO] Total time:  16.927 s
+[INFO] Finished at: 2024-05-17T23:46:33+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/felix-main-5.0.0 -Dclassworlds.conf=/etc/maven/m2-debian.conf -Dproperties.file.manual=/build/felix-main-5.0.0/debian/maven.properties org.codehaus.plexus.classworlds.launcher.Launcher -s/etc/maven/settings-debian.xml -Ddebian.dir=/build/felix-main-5.0.0/debian -Dmaven.repo.local=/build/felix-main-5.0.0/debian/maven-repo --batch-mode test
@@ -2013,8 +2027,8 @@
 [INFO] ------------------------------------------------------------------------
 [INFO] BUILD SUCCESS
 [INFO] ------------------------------------------------------------------------
-[INFO] Total time:  2.766 s
-[INFO] Finished at: 2023-04-14T15:20:14-12:00
+[INFO] Total time:  2.468 s
+[INFO] Finished at: 2024-05-17T23:46:38+14:00
 [INFO] ------------------------------------------------------------------------
    create-stamp debian/debhelper-build-stamp
  fakeroot debian/rules binary
@@ -2053,8 +2067,8 @@
 [INFO] ------------------------------------------------------------------------
 [INFO] BUILD SUCCESS
 [INFO] ------------------------------------------------------------------------
-[INFO] Total time:  2.559 s
-[INFO] Finished at: 2023-04-14T15:20:20-12:00
+[INFO] Total time:  2.130 s
+[INFO] Finished at: 2024-05-17T23:46:43+14:00
 [INFO] ------------------------------------------------------------------------
 	mh_resolve_dependencies --non-interactive --offline --build -plibfelix-main-java --javadoc --base-directory=/build/felix-main-5.0.0 --non-explore
 Analysing pom.xml...
@@ -2087,10 +2101,10 @@
    dh_missing
    dh_installdeb
    dh_gencontrol
-dpkg-gencontrol: warning: package libfelix-main-java-doc: substitution variable ${maven:CompileDepends} unused, but is defined
-dpkg-gencontrol: warning: package libfelix-main-java-doc: substitution variable ${maven:Depends} unused, but is defined
 dpkg-gencontrol: warning: package libfelix-main-java: substitution variable ${maven:CompileDepends} unused, but is defined
 dpkg-gencontrol: warning: package libfelix-main-java: substitution variable ${maven:DocDepends} unused, but is defined
+dpkg-gencontrol: warning: package libfelix-main-java-doc: substitution variable ${maven:CompileDepends} unused, but is defined
+dpkg-gencontrol: warning: package libfelix-main-java-doc: substitution variable ${maven:Depends} unused, but is defined
    dh_md5sums
    dh_builddeb
 dpkg-deb: building package 'libfelix-main-java' in '../libfelix-main-java_5.0.0-5_all.deb'.
@@ -2103,12 +2117,14 @@
 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/27017/tmp/hooks/B01_cleanup starting
+I: user script /srv/workspace/pbuilder/27017/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/9138 and its subdirectories
-I: Current time: Fri Apr 14 15:20:52 -12 2023
-I: pbuilder-time-stamp: 1681528852
+I: removing directory /srv/workspace/pbuilder/27017 and its subdirectories
+I: Current time: Fri May 17 23:47:15 +14 2024
+I: pbuilder-time-stamp: 1715939235