Diff of the two buildlogs:

--
--- b1/build.log	2025-01-20 09:17:41.030247526 +0000
+++ b2/build.log	2025-01-20 09:21:40.699474051 +0000
@@ -1,6 +1,6 @@
 I: pbuilder: network access will be disabled during build
-I: Current time: Sun Feb 22 03:38:51 -12 2026
-I: pbuilder-time-stamp: 1771774731
+I: Current time: Mon Jan 20 23:17:44 +14 2025
+I: pbuilder-time-stamp: 1737364664
 I: Building the build Environment
 I: extracting base tarball [/var/cache/pbuilder/trixie-reproducible-base.tgz]
 I: copying local configuration
@@ -22,52 +22,84 @@
 dpkg-source: info: unpacking maven-source-plugin_3.3.1-1.debian.tar.xz
 I: using fakeroot in build.
 I: Installing the build-deps
-I: user script /srv/workspace/pbuilder/3727570/tmp/hooks/D02_print_environment starting
+I: user script /srv/workspace/pbuilder/4118453/tmp/hooks/D01_modify_environment starting
+debug: Running on codethink02-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
+'/bin/sh' -> '/bin/bash'
+lrwxrwxrwx 1 root root 9 Jan 20 09:17 /bin/sh -> /bin/bash
+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/4118453/tmp/hooks/D01_modify_environment finished
+I: user script /srv/workspace/pbuilder/4118453/tmp/hooks/D02_print_environment starting
 I: set
-  BUILDDIR='/build/reproducible-path'
-  BUILDUSERGECOS='first user,first room,first work-phone,first home-phone,first other'
-  BUILDUSERNAME='pbuilder1'
-  BUILD_ARCH='arm64'
-  DEBIAN_FRONTEND='noninteractive'
+  BASH=/bin/sh
+  BASHOPTS=checkwinsize:cmdhist:complete_fullquote:extquote:force_fignore:globasciiranges:globskipdots:hostcomplete:interactive_comments:patsub_replacement:progcomp:promptvars:sourcepath
+  BASH_ALIASES=()
+  BASH_ARGC=()
+  BASH_ARGV=()
+  BASH_CMDS=()
+  BASH_LINENO=([0]="12" [1]="0")
+  BASH_LOADABLES_PATH=/usr/local/lib/bash:/usr/lib/bash:/opt/local/lib/bash:/usr/pkg/lib/bash:/opt/pkg/lib/bash:.
+  BASH_SOURCE=([0]="/tmp/hooks/D02_print_environment" [1]="/tmp/hooks/D02_print_environment")
+  BASH_VERSINFO=([0]="5" [1]="2" [2]="37" [3]="1" [4]="release" [5]="aarch64-unknown-linux-gnu")
+  BASH_VERSION='5.2.37(1)-release'
+  BUILDDIR=/build/reproducible-path
+  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=12 '
-  DISTRIBUTION='trixie'
-  HOME='/root'
-  HOST_ARCH='arm64'
+  DIRSTACK=()
+  DISTRIBUTION=trixie
+  EUID=0
+  FUNCNAME=([0]="Echo" [1]="main")
+  GROUPS=()
+  HOME=/root
+  HOSTNAME=i-capture-the-hostname
+  HOSTTYPE=aarch64
+  HOST_ARCH=arm64
   IFS=' 	
   '
-  INVOCATION_ID='0ffd8f51d54443f3b90cd2158ba94cd3'
-  LANG='C'
-  LANGUAGE='en_US:en'
-  LC_ALL='C'
-  MAIL='/var/mail/root'
-  OPTIND='1'
-  PATH='/usr/sbin:/usr/bin:/sbin:/bin:/usr/games'
-  PBCURRENTCOMMANDLINEOPERATION='build'
-  PBUILDER_OPERATION='build'
-  PBUILDER_PKGDATADIR='/usr/share/pbuilder'
-  PBUILDER_PKGLIBDIR='/usr/lib/pbuilder'
-  PBUILDER_SYSCONFDIR='/etc'
-  PPID='3727570'
-  PS1='# '
-  PS2='> '
+  INVOCATION_ID=aae8fead6ec64d9e827213c39b94cc7b
+  LANG=C
+  LANGUAGE=nl_BE:nl
+  LC_ALL=C
+  MACHTYPE=aarch64-unknown-linux-gnu
+  MAIL=/var/mail/root
+  OPTERR=1
+  OPTIND=1
+  OSTYPE=linux-gnu
+  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
+  PIPESTATUS=([0]="0")
+  POSIXLY_CORRECT=y
+  PPID=4118453
   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.UaJpW8Qj/pbuilderrc_rxY5 --distribution trixie --hookdir /etc/pbuilder/first-build-hooks --debbuildopts -b --basetgz /var/cache/pbuilder/trixie-reproducible-base.tgz --buildresult /srv/reproducible-results/rbuild-debian/r-b-build.UaJpW8Qj/b1 --logfile b1/build.log maven-source-plugin_3.3.1-1.dsc'
-  SUDO_GID='109'
-  SUDO_UID='104'
-  SUDO_USER='jenkins'
-  TERM='unknown'
-  TZ='/usr/share/zoneinfo/Etc/GMT+12'
-  USER='root'
-  _='/usr/bin/systemd-run'
-  http_proxy='http://192.168.101.4:3128'
+  PWD=/
+  SHELL=/bin/bash
+  SHELLOPTS=braceexpand:errexit:hashall:interactive-comments:posix
+  SHLVL=3
+  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.UaJpW8Qj/pbuilderrc_2EyP --distribution trixie --hookdir /etc/pbuilder/rebuild-hooks --debbuildopts -b --basetgz /var/cache/pbuilder/trixie-reproducible-base.tgz --buildresult /srv/reproducible-results/rbuild-debian/r-b-build.UaJpW8Qj/b2 --logfile b2/build.log maven-source-plugin_3.3.1-1.dsc'
+  SUDO_GID=109
+  SUDO_UID=104
+  SUDO_USER=jenkins
+  TERM=unknown
+  TZ=/usr/share/zoneinfo/Etc/GMT-14
+  UID=0
+  USER=root
+  _='I: set'
+  http_proxy=http://192.168.101.4:3128
 I: uname -a
-  Linux codethink01-arm64 6.1.0-30-cloud-arm64 #1 SMP Debian 6.1.124-1 (2025-01-12) aarch64 GNU/Linux
+  Linux i-capture-the-hostname 6.1.0-30-cloud-arm64 #1 SMP Debian 6.1.124-1 (2025-01-12) aarch64 GNU/Linux
 I: ls -l /bin
-  lrwxrwxrwx 1 root root 7 Nov 22  2024 /bin -> usr/bin
-I: user script /srv/workspace/pbuilder/3727570/tmp/hooks/D02_print_environment finished
+  lrwxrwxrwx 1 root root 7 Nov 22 14:40 /bin -> usr/bin
+I: user script /srv/workspace/pbuilder/4118453/tmp/hooks/D02_print_environment finished
  -> Attempting to satisfy build-dependencies
  -> Creating pbuilder-satisfydepends-dummy package
 Package: pbuilder-satisfydepends-dummy
@@ -420,7 +452,7 @@
 Get: 291 http://deb.debian.org/debian trixie/main arm64 maven-repo-helper all 1.11 [142 kB]
 Get: 292 http://deb.debian.org/debian trixie/main arm64 unzip arm64 6.0-28+b1 [158 kB]
 Get: 293 http://deb.debian.org/debian trixie/main arm64 maven-debian-helper all 2.6.6 [108 kB]
-Fetched 257 MB in 1s (225 MB/s)
+Fetched 257 MB in 1s (173 MB/s)
 Preconfiguring packages ...
 Selecting previously unselected package libapparmor1:arm64.
 (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 ... 19970 files and directories currently installed.)
@@ -1827,7 +1859,11 @@
 fakeroot is already the newest version (1.36.2-1).
 0 upgraded, 0 newly installed, 0 to remove and 0 not upgraded.
 I: Building the package
-I: Running cd /build/reproducible-path/maven-source-plugin-3.3.1/ && 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  > ../maven-source-plugin_3.3.1-1_source.changes
+I: user script /srv/workspace/pbuilder/4118453/tmp/hooks/A99_set_merged_usr starting
+Not re-configuring usrmerge for trixie
+I: user script /srv/workspace/pbuilder/4118453/tmp/hooks/A99_set_merged_usr finished
+hostname: Name or service not known
+I: Running cd /build/reproducible-path/maven-source-plugin-3.3.1/ && 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  > ../maven-source-plugin_3.3.1-1_source.changes
 dpkg-buildpackage: info: source package maven-source-plugin
 dpkg-buildpackage: info: source version 3.3.1-1
 dpkg-buildpackage: info: source distribution unstable
@@ -1912,8 +1948,8 @@
 [INFO] ------------------------------------------------------------------------
 [INFO] BUILD SUCCESS
 [INFO] ------------------------------------------------------------------------
-[INFO] Total time:  3.716 s
-[INFO] Finished at: 2026-02-22T15:39:53Z
+[INFO] Total time:  3.727 s
+[INFO] Finished at: 2025-01-20T09:20:49Z
 [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/reproducible-path/maven-source-plugin-3.3.1 -Dclassworlds.conf=/etc/maven/m2-debian.conf -Dproperties.file.manual=/build/reproducible-path/maven-source-plugin-3.3.1/debian/maven.properties org.codehaus.plexus.classworlds.launcher.Launcher -s/etc/maven/settings-debian.xml -Ddebian.dir=/build/reproducible-path/maven-source-plugin-3.3.1/debian -Dmaven.repo.local=/build/reproducible-path/maven-source-plugin-3.3.1/debian/maven-repo --batch-mode test
@@ -1967,14 +2003,14 @@
 [INFO] NOT adding java-sources to attached artifacts list.
 [INFO] NOT adding java-sources to attached artifacts list.
 [INFO] NOT adding java-sources to attached artifacts list.
-[INFO] Tests run: 4, Failures: 0, Errors: 0, Skipped: 0, Time elapsed: 2.073 s - in org.apache.maven.plugins.source.TestSourceJarMojoTest
+[INFO] Tests run: 4, Failures: 0, Errors: 0, Skipped: 0, Time elapsed: 2.119 s - in org.apache.maven.plugins.source.TestSourceJarMojoTest
 [INFO] Running org.apache.maven.plugins.source.SourceJarMojoTest
 [INFO] NOT adding java-sources to attached artifacts list.
 [INFO] NOT adding java-sources to attached artifacts list.
 [INFO] NOT adding java-sources to attached artifacts list.
 [INFO] NOT adding java-sources to attached artifacts list.
 [INFO] NOT adding java-sources to attached artifacts list.
-[INFO] Tests run: 6, Failures: 0, Errors: 0, Skipped: 0, Time elapsed: 0.586 s - in org.apache.maven.plugins.source.SourceJarMojoTest
+[INFO] Tests run: 6, Failures: 0, Errors: 0, Skipped: 0, Time elapsed: 0.71 s - in org.apache.maven.plugins.source.SourceJarMojoTest
 [INFO] 
 [INFO] Results:
 [INFO] 
@@ -1983,8 +2019,8 @@
 [INFO] ------------------------------------------------------------------------
 [INFO] BUILD SUCCESS
 [INFO] ------------------------------------------------------------------------
-[INFO] Total time:  35.764 s
-[INFO] Finished at: 2026-02-22T15:40:30Z
+[INFO] Total time:  36.016 s
+[INFO] Finished at: 2025-01-20T09:21:27Z
 [INFO] ------------------------------------------------------------------------
    create-stamp debian/debhelper-build-stamp
  fakeroot debian/rules binary
@@ -2019,8 +2055,8 @@
 [INFO] ------------------------------------------------------------------------
 [INFO] BUILD SUCCESS
 [INFO] ------------------------------------------------------------------------
-[INFO] Total time:  0.532 s
-[INFO] Finished at: 2026-02-22T15:40:33Z
+[INFO] Total time:  1.986 s
+[INFO] Finished at: 2025-01-20T09:21:33Z
 [INFO] ------------------------------------------------------------------------
 	mh_resolve_dependencies --non-interactive --offline --build -plibmaven-source-plugin-java --base-directory=/build/reproducible-path/maven-source-plugin-3.3.1 --non-explore
 Analysing pom.xml...
@@ -2050,12 +2086,14 @@
 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/4118453/tmp/hooks/B01_cleanup starting
+I: user script /srv/workspace/pbuilder/4118453/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/3727570 and its subdirectories
-I: Current time: Sun Feb 22 03:40:39 -12 2026
-I: pbuilder-time-stamp: 1771774839
+I: removing directory /srv/workspace/pbuilder/4118453 and its subdirectories
+I: Current time: Mon Jan 20 23:21:39 +14 2025
+I: pbuilder-time-stamp: 1737364899