Diff of the two buildlogs:

--
--- b1/build.log	2023-04-13 18:12:55.442187821 +0000
+++ b2/build.log	2023-04-13 18:17:48.017200443 +0000
@@ -1,6 +1,6 @@
 I: pbuilder: network access will be disabled during build
-I: Current time: Thu Apr 13 06:08:22 -12 2023
-I: pbuilder-time-stamp: 1681409302
+I: Current time: Thu May 16 14:35:59 +14 2024
+I: pbuilder-time-stamp: 1715819759
 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 [./mp4parser_1.1.22.orig.tar.xz]
 I: copying [./mp4parser_1.1.22-1.debian.tar.xz]
 I: Extracting source
-gpgv: Signature made Mon Jan 21 21:32:20 2019 -12
+gpgv: Signature made Tue Jan 22 23:32:20 2019 +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 02-disable-android-logger.patch
 I: using fakeroot in build.
 I: Installing the build-deps
-I: user script /srv/workspace/pbuilder/8927/tmp/hooks/D02_print_environment starting
+I: user script /srv/workspace/pbuilder/16786/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/16786/tmp/hooks/D01_modify_environment finished
+I: user script /srv/workspace/pbuilder/16786/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='8927'
+  PPID='16786'
   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.TzAmFM74/pbuilderrc_Jgzj --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.TzAmFM74/b1 --logfile b1/build.log mp4parser_1.1.22-1.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.TzAmFM74/pbuilderrc_9hHm --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.TzAmFM74/b2 --logfile b2/build.log --extrapackages usrmerge mp4parser_1.1.22-1.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 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/8927/tmp/hooks/D02_print_environment finished
+  lrwxrwxrwx 1 root root 7 May 16 07:12 /bin -> usr/bin
+I: user script /srv/workspace/pbuilder/16786/tmp/hooks/D02_print_environment finished
  -> Attempting to satisfy build-dependencies
  -> Creating pbuilder-satisfydepends-dummy package
 Package: pbuilder-satisfydepends-dummy
@@ -388,7 +397,7 @@
 Get: 263 http://deb.debian.org/debian bookworm/main arm64 maven all 3.8.7-1 [18.9 kB]
 Get: 264 http://deb.debian.org/debian bookworm/main arm64 maven-repo-helper all 1.11 [142 kB]
 Get: 265 http://deb.debian.org/debian bookworm/main arm64 maven-debian-helper all 2.6.2 [108 kB]
-Fetched 416 MB in 30s (13.9 MB/s)
+Fetched 416 MB in 32s (13.1 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%
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(Reading database ... 20%
(Reading database ... 25%
(Reading database ... 30%
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(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.)
@@ -1651,10 +1660,15 @@
 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/mp4parser-1.1.22/ && 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  > ../mp4parser_1.1.22-1_source.changes
+I: user script /srv/workspace/pbuilder/16786/tmp/hooks/A99_set_merged_usr starting
+Re-configuring usrmerge...
+I: user script /srv/workspace/pbuilder/16786/tmp/hooks/A99_set_merged_usr finished
+hostname: Temporary failure in name resolution
+I: Running cd /build/mp4parser-1.1.22/ && 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  > ../mp4parser_1.1.22-1_source.changes
 dpkg-buildpackage: info: source package mp4parser
 dpkg-buildpackage: info: source version 1.1.22-1
 dpkg-buildpackage: info: source distribution unstable
@@ -1748,13 +1762,13 @@
 [INFO] ------------------------------------------------------------------------
 [INFO] Reactor Summary for MP4 Parser Project 1.1.22:
 [INFO] 
-[INFO] ISO Parser ......................................... SUCCESS [01:03 min]
-[INFO] MP4 Parser Project ................................. SUCCESS [  0.007 s]
+[INFO] ISO Parser ......................................... SUCCESS [01:12 min]
+[INFO] MP4 Parser Project ................................. SUCCESS [  0.006 s]
 [INFO] ------------------------------------------------------------------------
 [INFO] BUILD SUCCESS
 [INFO] ------------------------------------------------------------------------
-[INFO] Total time:  01:04 min
-[INFO] Finished at: 2023-04-13T06:11:48-12:00
+[INFO] Total time:  01:12 min
+[INFO] Finished at: 2024-05-16T14:39:37+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/mp4parser-1.1.22 -Dclassworlds.conf=/etc/maven/m2-debian.conf -Dproperties.file.manual=/build/mp4parser-1.1.22/debian/maven.properties org.codehaus.plexus.classworlds.launcher.Launcher -s/etc/maven/settings-debian.xml -Ddebian.dir=/build/mp4parser-1.1.22/debian -Dmaven.repo.local=/build/mp4parser-1.1.22/debian/maven-repo --batch-mode test
@@ -1806,13 +1820,13 @@
 [INFO] ------------------------------------------------------------------------
 [INFO] Reactor Summary for MP4 Parser Project 1.1.22:
 [INFO] 
-[INFO] ISO Parser ......................................... SUCCESS [ 28.744 s]
-[INFO] MP4 Parser Project ................................. SUCCESS [  0.004 s]
+[INFO] ISO Parser ......................................... SUCCESS [ 33.341 s]
+[INFO] MP4 Parser Project ................................. SUCCESS [  0.001 s]
 [INFO] ------------------------------------------------------------------------
 [INFO] BUILD SUCCESS
 [INFO] ------------------------------------------------------------------------
-[INFO] Total time:  29.128 s
-[INFO] Finished at: 2023-04-13T06:12:24-12:00
+[INFO] Total time:  33.878 s
+[INFO] Finished at: 2024-05-16T14:40:17+14:00
 [INFO] ------------------------------------------------------------------------
    create-stamp debian/debhelper-build-stamp
  fakeroot debian/rules binary
@@ -1855,13 +1869,13 @@
 [INFO] ------------------------------------------------------------------------
 [INFO] Reactor Summary for MP4 Parser Project 1.1.22:
 [INFO] 
-[INFO] ISO Parser ......................................... SUCCESS [  2.570 s]
-[INFO] MP4 Parser Project ................................. SUCCESS [  0.197 s]
+[INFO] ISO Parser ......................................... SUCCESS [  2.026 s]
+[INFO] MP4 Parser Project ................................. SUCCESS [  0.246 s]
 [INFO] ------------------------------------------------------------------------
 [INFO] BUILD SUCCESS
 [INFO] ------------------------------------------------------------------------
-[INFO] Total time:  3.414 s
-[INFO] Finished at: 2023-04-13T06:12:34-12:00
+[INFO] Total time:  2.952 s
+[INFO] Finished at: 2024-05-16T14:40:28+14:00
 [INFO] ------------------------------------------------------------------------
 	mh_resolve_dependencies --non-interactive --offline --build -plibisoparser-java --base-directory=/build/mp4parser-1.1.22 --non-explore
 Analysing pom.xml...
@@ -1888,12 +1902,14 @@
 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/16786/tmp/hooks/B01_cleanup starting
+I: user script /srv/workspace/pbuilder/16786/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/8927 and its subdirectories
-I: Current time: Thu Apr 13 06:12:54 -12 2023
-I: pbuilder-time-stamp: 1681409574
+I: removing directory /srv/workspace/pbuilder/16786 and its subdirectories
+I: Current time: Thu May 16 14:40:46 +14 2024
+I: pbuilder-time-stamp: 1715820046