Diff of the two buildlogs:

--
--- b1/build.log	2025-01-19 22:24:59.729085169 +0000
+++ b2/build.log	2025-01-19 22:27:07.259353706 +0000
@@ -1,6 +1,6 @@
 I: pbuilder: network access will be disabled during build
-I: Current time: Sat Feb 21 16:45:08 -12 2026
-I: pbuilder-time-stamp: 1771735508
+I: Current time: Mon Jan 20 12:25:02 +14 2025
+I: pbuilder-time-stamp: 1737325502
 I: Building the build Environment
 I: extracting base tarball [/var/cache/pbuilder/unstable-reproducible-base.tgz]
 I: copying local configuration
@@ -23,54 +23,86 @@
 dpkg-source: info: unpacking codenarc_0.23-6.debian.tar.xz
 I: using fakeroot in build.
 I: Installing the build-deps
-I: user script /srv/workspace/pbuilder/32043/tmp/hooks/D02_print_environment starting
+I: user script /srv/workspace/pbuilder/51308/tmp/hooks/D01_modify_environment starting
+debug: Running on ionos12-i386.
+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 19 22:25 /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/51308/tmp/hooks/D01_modify_environment finished
+I: user script /srv/workspace/pbuilder/51308/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='i386'
-  DEBIAN_FRONTEND='noninteractive'
-  DEB_BUILD_OPTIONS='buildinfo=+all reproducible=+all parallel=22 '
-  DISTRIBUTION='unstable'
-  HOME='/root'
-  HOST_ARCH='i386'
+  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]="i686-pc-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=i386
+  DEBIAN_FRONTEND=noninteractive
+  DEB_BUILD_OPTIONS='buildinfo=+all reproducible=+all parallel=10 '
+  DIRSTACK=()
+  DISTRIBUTION=unstable
+  EUID=0
+  FUNCNAME=([0]="Echo" [1]="main")
+  GROUPS=()
+  HOME=/root
+  HOSTNAME=i-capture-the-hostname
+  HOSTTYPE=i686
+  HOST_ARCH=i386
   IFS=' 	
   '
-  INVOCATION_ID='93ba840541104c9599ab7468030c46a8'
-  LANG='C'
-  LANGUAGE='en_US:en'
-  LC_ALL='C'
-  LD_LIBRARY_PATH='/usr/lib/libeatmydata'
-  LD_PRELOAD='libeatmydata.so'
-  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='32043'
-  PS1='# '
-  PS2='> '
+  INVOCATION_ID=0331eb7917ec4e0a9a8340536da43972
+  LANG=C
+  LANGUAGE=de_CH:de
+  LC_ALL=C
+  LD_LIBRARY_PATH=/usr/lib/libeatmydata
+  LD_PRELOAD=libeatmydata.so
+  MACHTYPE=i686-pc-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=51308
   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.SdSUFtqp/pbuilderrc_FDjD --distribution unstable --hookdir /etc/pbuilder/first-build-hooks --debbuildopts -b --basetgz /var/cache/pbuilder/unstable-reproducible-base.tgz --buildresult /srv/reproducible-results/rbuild-debian/r-b-build.SdSUFtqp/b1 --logfile b1/build.log codenarc_0.23-6.dsc'
-  SUDO_GID='112'
-  SUDO_UID='107'
-  SUDO_USER='jenkins'
-  TERM='unknown'
-  TZ='/usr/share/zoneinfo/Etc/GMT+12'
-  USER='root'
-  _='/usr/bin/systemd-run'
-  http_proxy='http://213.165.73.152:3128'
+  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.SdSUFtqp/pbuilderrc_pKQa --distribution unstable --hookdir /etc/pbuilder/rebuild-hooks --debbuildopts -b --basetgz /var/cache/pbuilder/unstable-reproducible-base.tgz --buildresult /srv/reproducible-results/rbuild-debian/r-b-build.SdSUFtqp/b2 --logfile b2/build.log codenarc_0.23-6.dsc'
+  SUDO_GID=112
+  SUDO_UID=107
+  SUDO_USER=jenkins
+  TERM=unknown
+  TZ=/usr/share/zoneinfo/Etc/GMT-14
+  UID=0
+  USER=root
+  _='I: set'
+  http_proxy=http://46.16.76.132:3128
 I: uname -a
-  Linux ionos6-i386 6.1.0-30-amd64 #1 SMP PREEMPT_DYNAMIC Debian 6.1.124-1 (2025-01-12) x86_64 GNU/Linux
+  Linux i-capture-the-hostname 6.1.0-30-amd64 #1 SMP PREEMPT_DYNAMIC Debian 6.1.124-1 (2025-01-12) x86_64 GNU/Linux
 I: ls -l /bin
-  lrwxrwxrwx 1 root root 7 Nov 22  2024 /bin -> usr/bin
-I: user script /srv/workspace/pbuilder/32043/tmp/hooks/D02_print_environment finished
+  lrwxrwxrwx 1 root root 7 Nov 22 14:40 /bin -> usr/bin
+I: user script /srv/workspace/pbuilder/51308/tmp/hooks/D02_print_environment finished
  -> Attempting to satisfy build-dependencies
  -> Creating pbuilder-satisfydepends-dummy package
 Package: pbuilder-satisfydepends-dummy
@@ -410,7 +442,7 @@
 Get: 284 http://deb.debian.org/debian unstable/main i386 liblog4j1.2-java all 1.2.17-11 [444 kB]
 Get: 285 http://deb.debian.org/debian unstable/main i386 libgmetrics-groovy-java all 0.7-5 [455 kB]
 Get: 286 http://deb.debian.org/debian unstable/main i386 maven-repo-helper all 1.11 [142 kB]
-Fetched 290 MB in 6s (50.7 MB/s)
+Fetched 290 MB in 4s (82.4 MB/s)
 Preconfiguring packages ...
 Selecting previously unselected package libsystemd-shared:i386.
 (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 ... 19837 files and directories currently installed.)
@@ -1363,8 +1395,8 @@
 Setting up tzdata (2025a-1) ...
 
 Current default time zone: 'Etc/UTC'
-Local time is now:      Sun Feb 22 04:46:19 UTC 2026.
-Universal Time is now:  Sun Feb 22 04:46:19 UTC 2026.
+Local time is now:      Sun Jan 19 22:25:53 UTC 2025.
+Universal Time is now:  Sun Jan 19 22:25:53 UTC 2025.
 Run 'dpkg-reconfigure tzdata' if you wish to change it.
 
 Setting up libxcb-present0:i386 (1.17.0-2+b1) ...
@@ -1818,7 +1850,11 @@
 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/codenarc-0.23/ && 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  > ../codenarc_0.23-6_source.changes
+I: user script /srv/workspace/pbuilder/51308/tmp/hooks/A99_set_merged_usr starting
+Not re-configuring usrmerge for unstable
+I: user script /srv/workspace/pbuilder/51308/tmp/hooks/A99_set_merged_usr finished
+hostname: Name or service not known
+I: Running cd /build/reproducible-path/codenarc-0.23/ && 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  > ../codenarc_0.23-6_source.changes
 dpkg-buildpackage: info: source package codenarc
 dpkg-buildpackage: info: source version 0.23-6
 dpkg-buildpackage: info: source distribution unstable
@@ -1831,7 +1867,7 @@
 make[1]: Entering directory '/build/reproducible-path/codenarc-0.23'
 jh_clean
 Duplicate specification "unlink|u" for option "u"
-Duplicate specification "u=s" for option "u"
+Duplicate specification "unlink|u" for option "u"
 ant -f debian/build.xml clean
 Buildfile: /build/reproducible-path/codenarc-0.23/debian/build.xml
 
@@ -1861,7 +1897,7 @@
   [groovyc] warning: [options] source value 8 is obsolete and will be removed in a future release
   [groovyc] warning: [options] target value 8 is obsolete and will be removed in a future release
   [groovyc] warning: [options] To suppress warnings about obsolete options, use -Xlint:-options.
-  [groovyc] /tmp/groovy-generated--java-source14338487518308383076/org/codenarc/source/SourceCode.java:13: warning: [removal] Integer(int) in Integer has been deprecated and marked for removal
+  [groovyc] /tmp/groovy-generated--java-source17947216247862998949/org/codenarc/source/SourceCode.java:13: warning: [removal] Integer(int) in Integer has been deprecated and marked for removal
   [groovyc] int DEFAULT_COMPILER_PHASE = new java.lang.Integer((int)0);
   [groovyc]                              ^
   [groovyc] Note: /build/reproducible-path/codenarc-0.23/src/main/java/org/codenarc/rule/AbstractAstVisitorRule.java uses or overrides a deprecated API.
@@ -1874,15 +1910,15 @@
       [jar] Building jar: /build/reproducible-path/codenarc-0.23/target/CodeNarc.jar
 
 groovydoc:
-[groovydoc] Feb 21, 2026 4:47:09 PM java.util.prefs.FileSystemPreferences$1 run
+[groovydoc] Jan 20, 2025 12:26:25 PM java.util.prefs.FileSystemPreferences$1 run
 [groovydoc] WARNING: Couldn't create user preferences directory. User preferences are unusable.
-[groovydoc] Feb 21, 2026 4:47:09 PM java.util.prefs.FileSystemPreferences$1 run
+[groovydoc] Jan 20, 2025 12:26:25 PM java.util.prefs.FileSystemPreferences$1 run
 [groovydoc] WARNING: java.io.IOException: No such file or directory
 
 package:
 
 BUILD SUCCESSFUL
-Total time: 49 seconds
+Total time: 31 seconds
 make[1]: Leaving directory '/build/reproducible-path/codenarc-0.23'
    create-stamp debian/debhelper-build-stamp
    dh_prep
@@ -1919,12 +1955,14 @@
 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/51308/tmp/hooks/B01_cleanup starting
+I: user script /srv/workspace/pbuilder/51308/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/32043 and its subdirectories
-I: Current time: Sat Feb 21 16:47:57 -12 2026
-I: pbuilder-time-stamp: 1771735677
+I: removing directory /srv/workspace/pbuilder/51308 and its subdirectories
+I: Current time: Mon Jan 20 12:27:06 +14 2025
+I: pbuilder-time-stamp: 1737325626