Diff of the two buildlogs:

--
--- b1/build.log	2024-10-26 01:58:29.027163249 +0000
+++ b2/build.log	2024-10-26 01:59:06.869816832 +0000
@@ -1,6 +1,6 @@
 I: pbuilder: network access will be disabled during build
-I: Current time: Fri Oct 25 13:57:32 -12 2024
-I: pbuilder-time-stamp: 1729907852
+I: Current time: Fri Nov 28 22:21:28 +14 2025
+I: pbuilder-time-stamp: 1764318088
 I: Building the build Environment
 I: extracting base tarball [/var/cache/pbuilder/unstable-reproducible-base.tgz]
 I: copying local configuration
@@ -28,53 +28,85 @@
 dpkg-source: info: applying debian/0001-build.patch
 I: Not using root during the build.
 I: Installing the build-deps
-I: user script /srv/workspace/pbuilder/29329/tmp/hooks/D02_print_environment starting
+I: user script /srv/workspace/pbuilder/19078/tmp/hooks/D01_modify_environment starting
+debug: Running on infom08-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 Nov 28 08:21 /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/19078/tmp/hooks/D01_modify_environment finished
+I: user script /srv/workspace/pbuilder/19078/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=6 '
-  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]="32" [3]="1" [4]="release" [5]="i686-pc-linux-gnu")
+  BASH_VERSION='5.2.32(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=5 '
+  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='6b65e6796e9f49418f5779add86d5a56'
-  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='29329'
-  PS1='# '
-  PS2='> '
+  INVOCATION_ID=3e814c2b578746a58aafb84d412d1209
+  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=19078
   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.x9G9xiZ5/pbuilderrc_guLY --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.x9G9xiZ5/b1 --logfile b1/build.log tarlz_0.25-2.dsc'
-  SUDO_GID='111'
-  SUDO_UID='104'
-  SUDO_USER='jenkins'
-  TERM='unknown'
-  TZ='/usr/share/zoneinfo/Etc/GMT+12'
-  USER='root'
-  _='/usr/bin/systemd-run'
+  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.x9G9xiZ5/pbuilderrc_rzXt --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.x9G9xiZ5/b2 --logfile b2/build.log tarlz_0.25-2.dsc'
+  SUDO_GID=111
+  SUDO_UID=104
+  SUDO_USER=jenkins
+  TERM=unknown
+  TZ=/usr/share/zoneinfo/Etc/GMT-14
+  UID=0
+  USER=root
+  _='I: set'
 I: uname -a
-  Linux infom07-i386 6.1.0-26-amd64 #1 SMP PREEMPT_DYNAMIC Debian 6.1.112-1 (2024-09-30) x86_64 GNU/Linux
+  Linux i-capture-the-hostname 6.10.11+bpo-amd64 #1 SMP PREEMPT_DYNAMIC Debian 6.10.11-1~bpo12+1 (2024-10-03) x86_64 GNU/Linux
 I: ls -l /bin
-  lrwxrwxrwx 1 root root 7 Aug  4 21:30 /bin -> usr/bin
-I: user script /srv/workspace/pbuilder/29329/tmp/hooks/D02_print_environment finished
+  lrwxrwxrwx 1 root root 7 Aug  4  2024 /bin -> usr/bin
+I: user script /srv/workspace/pbuilder/19078/tmp/hooks/D02_print_environment finished
  -> Attempting to satisfy build-dependencies
  -> Creating pbuilder-satisfydepends-dummy package
 Package: pbuilder-satisfydepends-dummy
@@ -154,7 +186,7 @@
 Get: 38 http://deb.debian.org/debian unstable/main i386 tex-common all 6.18 [32.5 kB]
 Get: 39 http://deb.debian.org/debian unstable/main i386 texinfo-lib i386 7.1.1-1+b1 [236 kB]
 Get: 40 http://deb.debian.org/debian unstable/main i386 texinfo all 7.1.1-1 [1753 kB]
-Fetched 22.8 MB in 0s (59.6 MB/s)
+Fetched 22.8 MB in 0s (104 MB/s)
 debconf: delaying package configuration, since apt-utils is not installed
 Selecting previously unselected package sensible-utils.
 (Reading database ... 
(Reading database ... 5%
(Reading database ... 10%
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(Reading database ... 20%
(Reading database ... 25%
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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 ... 19933 files and directories currently installed.)
@@ -339,7 +371,11 @@
 Building tag database...
  -> Finished parsing the build-deps
 I: Building the package
-I: Running cd /build/reproducible-path/tarlz-0.25/ && 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  > ../tarlz_0.25-2_source.changes
+I: user script /srv/workspace/pbuilder/19078/tmp/hooks/A99_set_merged_usr starting
+Not re-configuring usrmerge for unstable
+I: user script /srv/workspace/pbuilder/19078/tmp/hooks/A99_set_merged_usr finished
+hostname: Name or service not known
+I: Running cd /build/reproducible-path/tarlz-0.25/ && 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  > ../tarlz_0.25-2_source.changes
 dpkg-buildpackage: info: source package tarlz
 dpkg-buildpackage: info: source version 0.25-2
 dpkg-buildpackage: info: source distribution sid
@@ -388,7 +424,7 @@
 (see INSTALL).
 make[1]: Leaving directory '/build/reproducible-path/tarlz-0.25'
    dh_auto_build
-	make -j6
+	make -j5
 make[1]: Entering directory '/build/reproducible-path/tarlz-0.25'
 i686-linux-gnu-g++ -g -Wdate-time -D_FORTIFY_SOURCE=2 -g -O2 -ffile-prefix-map=/build/reproducible-path/tarlz-0.25=. -fstack-protector-strong -Wformat -Werror=format-security -c -o arg_parser.o arg_parser.cc
 i686-linux-gnu-g++ -g -Wdate-time -D_FORTIFY_SOURCE=2 -g -O2 -ffile-prefix-map=/build/reproducible-path/tarlz-0.25=. -fstack-protector-strong -Wformat -Werror=format-security -c -o lzip_index.o lzip_index.cc
@@ -417,19 +453,19 @@
    debian/rules override_dh_auto_install
 make[1]: Entering directory '/build/reproducible-path/tarlz-0.25'
 dh_auto_install -- DESTDIR=/build/reproducible-path/tarlz-0.25/debian/tarlz
-	make -j6 install DESTDIR=/build/reproducible-path/tarlz-0.25/debian/tarlz AM_UPDATE_INFO_DIR=no DESTDIR=/build/reproducible-path/tarlz-0.25/debian/tarlz
+	make -j5 install DESTDIR=/build/reproducible-path/tarlz-0.25/debian/tarlz AM_UPDATE_INFO_DIR=no DESTDIR=/build/reproducible-path/tarlz-0.25/debian/tarlz
 make[2]: Entering directory '/build/reproducible-path/tarlz-0.25'
 if [ ! -d "/build/reproducible-path/tarlz-0.25/debian/tarlz/usr/bin" ] ; then install -d -m 755 "/build/reproducible-path/tarlz-0.25/debian/tarlz/usr/bin" ; fi
 if [ ! -d "/build/reproducible-path/tarlz-0.25/debian/tarlz/usr/share/info" ] ; then install -d -m 755 "/build/reproducible-path/tarlz-0.25/debian/tarlz/usr/share/info" ; fi
 if [ ! -d "/build/reproducible-path/tarlz-0.25/debian/tarlz/usr/share/man/man1" ] ; then install -d -m 755 "/build/reproducible-path/tarlz-0.25/debian/tarlz/usr/share/man/man1" ; fi
 install -m 755 ./tarlz "/build/reproducible-path/tarlz-0.25/debian/tarlz/usr/bin/tarlz"
-rm -f "/build/reproducible-path/tarlz-0.25/debian/tarlz/usr/share/info/tarlz.info"*
 rm -f "/build/reproducible-path/tarlz-0.25/debian/tarlz/usr/share/man/man1/tarlz.1"*
+rm -f "/build/reproducible-path/tarlz-0.25/debian/tarlz/usr/share/info/tarlz.info"*
+install -m 644 ./doc/tarlz.1 "/build/reproducible-path/tarlz-0.25/debian/tarlz/usr/share/man/man1/tarlz.1"
 install -m 644 ./doc/tarlz.info "/build/reproducible-path/tarlz-0.25/debian/tarlz/usr/share/info/tarlz.info"
 if /bin/sh -c "install-info --version" > /dev/null 2>&1 ; then \
   install-info --info-dir="/build/reproducible-path/tarlz-0.25/debian/tarlz/usr/share/info" "/build/reproducible-path/tarlz-0.25/debian/tarlz/usr/share/info/tarlz.info" ; \
 fi
-install -m 644 ./doc/tarlz.1 "/build/reproducible-path/tarlz-0.25/debian/tarlz/usr/share/man/man1/tarlz.1"
 make[2]: Leaving directory '/build/reproducible-path/tarlz-0.25'
 make[1]: Leaving directory '/build/reproducible-path/tarlz-0.25'
    debian/rules execute_after_dh_auto_install
@@ -463,12 +499,14 @@
 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/19078/tmp/hooks/B01_cleanup starting
+I: user script /srv/workspace/pbuilder/19078/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/29329 and its subdirectories
-I: Current time: Fri Oct 25 13:58:27 -12 2024
-I: pbuilder-time-stamp: 1729907907
+I: removing directory /srv/workspace/pbuilder/19078 and its subdirectories
+I: Current time: Fri Nov 28 22:22:01 +14 2025
+I: pbuilder-time-stamp: 1764318121