Diff of the two buildlogs:

--
--- b1/build.log	2025-03-13 22:51:29.304634456 +0000
+++ b2/build.log	2025-03-13 22:52:26.566068160 +0000
@@ -1,6 +1,6 @@
 I: pbuilder: network access will be disabled during build
-I: Current time: Thu Mar 13 10:50:39 -12 2025
-I: pbuilder-time-stamp: 1741906239
+I: Current time: Thu Apr 16 19:14:31 +14 2026
+I: pbuilder-time-stamp: 1776316471
 I: Building the build Environment
 I: extracting base tarball [/var/cache/pbuilder/trixie-reproducible-base.tgz]
 I: copying local configuration
@@ -20,52 +20,84 @@
 dpkg-source: info: unpacking python3-defaults_3.13.2-2.tar.gz
 I: using fakeroot in build.
 I: Installing the build-deps
-I: user script /srv/workspace/pbuilder/2467236/tmp/hooks/D02_print_environment starting
+I: user script /srv/workspace/pbuilder/674232/tmp/hooks/D01_modify_environment starting
+debug: Running on codethink03-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 Apr 16 05:14 /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/674232/tmp/hooks/D01_modify_environment finished
+I: user script /srv/workspace/pbuilder/674232/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='173cc8a7a46a4e42990dbd4551fcada8'
-  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='2467236'
-  PS1='# '
-  PS2='> '
+  INVOCATION_ID=5a8ae8e07eea4537ab695307e526e317
+  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=674232
   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.MhFLxHIe/pbuilderrc_OO0t --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.MhFLxHIe/b1 --logfile b1/build.log python3-defaults_3.13.2-2.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.MhFLxHIe/pbuilderrc_bRTa --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.MhFLxHIe/b2 --logfile b2/build.log python3-defaults_3.13.2-2.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 codethink04-arm64 6.1.0-31-cloud-arm64 #1 SMP Debian 6.1.128-1 (2025-02-07) aarch64 GNU/Linux
+  Linux i-capture-the-hostname 6.1.0-31-cloud-arm64 #1 SMP Debian 6.1.128-1 (2025-02-07) aarch64 GNU/Linux
 I: ls -l /bin
-  lrwxrwxrwx 1 root root 7 Mar  4 11:20 /bin -> usr/bin
-I: user script /srv/workspace/pbuilder/2467236/tmp/hooks/D02_print_environment finished
+  lrwxrwxrwx 1 root root 7 Mar  4  2025 /bin -> usr/bin
+I: user script /srv/workspace/pbuilder/674232/tmp/hooks/D02_print_environment finished
  -> Attempting to satisfy build-dependencies
  -> Creating pbuilder-satisfydepends-dummy package
 Package: pbuilder-satisfydepends-dummy
@@ -183,7 +215,7 @@
 Get: 72 http://deb.debian.org/debian trixie/main arm64 python3-snowballstemmer all 2.2.0-4 [58.0 kB]
 Get: 73 http://deb.debian.org/debian trixie/main arm64 sphinx-common all 8.1.3-5 [617 kB]
 Get: 74 http://deb.debian.org/debian trixie/main arm64 python3-sphinx all 8.1.3-5 [468 kB]
-Fetched 38.0 MB in 0s (169 MB/s)
+Fetched 38.0 MB in 0s (83.1 MB/s)
 Preconfiguring packages ...
 Selecting previously unselected package libpython3.13-minimal: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 ... 19916 files and directories currently installed.)
@@ -434,8 +466,8 @@
 Setting up tzdata (2025a-2) ...
 
 Current default time zone: 'Etc/UTC'
-Local time is now:      Thu Mar 13 22:51:01 UTC 2025.
-Universal Time is now:  Thu Mar 13 22:51:01 UTC 2025.
+Local time is now:      Thu Apr 16 05:14:59 UTC 2026.
+Universal Time is now:  Thu Apr 16 05:14:59 UTC 2026.
 Run 'dpkg-reconfigure tzdata' if you wish to change it.
 
 Setting up autotools-dev (20220109.1) ...
@@ -521,7 +553,11 @@
 fakeroot is already the newest version (1.37-1).
 0 upgraded, 0 newly installed, 0 to remove and 0 not upgraded.
 I: Building the package
-I: Running cd /build/reproducible-path/python3-defaults-3.13.2/ && 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  > ../python3-defaults_3.13.2-2_source.changes
+I: user script /srv/workspace/pbuilder/674232/tmp/hooks/A99_set_merged_usr starting
+Not re-configuring usrmerge for trixie
+I: user script /srv/workspace/pbuilder/674232/tmp/hooks/A99_set_merged_usr finished
+hostname: Name or service not known
+I: Running cd /build/reproducible-path/python3-defaults-3.13.2/ && 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  > ../python3-defaults_3.13.2-2_source.changes
 dpkg-buildpackage: info: source package python3-defaults
 dpkg-buildpackage: info: source version 3.13.2-2
 dpkg-buildpackage: info: source distribution unstable
@@ -569,13 +605,13 @@
 dh_installdirs
 make check_versions
 make[1]: Entering directory '/build/reproducible-path/python3-defaults-3.13.2'
-+ sed -rn s|^supported-versions = (.*)|\1|p debian/debian_defaults
-+ sed s/python//g;s/,//g
+++ sed -rn 's|^supported-versions = (.*)|\1|p' debian/debian_defaults
+++ sed 's/python//g;s/,//g'
 + SUPPORTED=3.13
 + MIN_SUPPORTED=3.13
 + MAX_SUPPORTED=3.13
-+ grep -Fq python3-supported-min (= 3.13) debian/control
-+ grep -Fq python3-supported-max (= 3.13) debian/control
++ grep -Fq 'python3-supported-min (= 3.13)' debian/control
++ grep -Fq 'python3-supported-max (= 3.13)' debian/control
 make[1]: Leaving directory '/build/reproducible-path/python3-defaults-3.13.2'
 DESTDIR=debian/python3 PREFIX=/usr make install-dev
 make[1]: Entering directory '/build/reproducible-path/python3-defaults-3.13.2'
@@ -838,8 +874,8 @@
 dh_gencontrol -i 
 dh_md5sums -i 
 dh_builddeb -i 
-dpkg-deb: building package 'idle' in '../idle_3.13.2-2_all.deb'.
 dpkg-deb: building package 'python3-examples' in '../python3-examples_3.13.2-2_all.deb'.
+dpkg-deb: building package 'idle' in '../idle_3.13.2-2_all.deb'.
 dpkg-deb: building package 'python3-doc' in '../python3-doc_3.13.2-2_all.deb'.
 dh_testdir -a
 dh_testroot -a
@@ -882,9 +918,9 @@
 	debian/python3-dev/usr/share/doc/python3/
 dh_sphinxdoc -v -p python3-dev
 	ln -sf ../../../javascript/sphinxdoc/1.0/sphinx_highlight.js debian/python3-dev/usr/share/doc/python3/_static/sphinx_highlight.js
-	ln -sf ../../../javascript/sphinxdoc/1.0/doctools.js debian/python3-dev/usr/share/doc/python3/_static/doctools.js
-	ln -sf ../../../javascript/sphinxdoc/1.0/searchtools.js debian/python3-dev/usr/share/doc/python3/_static/searchtools.js
 	ln -sf ../../../javascript/sphinxdoc/1.0/language_data.js debian/python3-dev/usr/share/doc/python3/_static/language_data.js
+	ln -sf ../../../javascript/sphinxdoc/1.0/searchtools.js debian/python3-dev/usr/share/doc/python3/_static/searchtools.js
+	ln -sf ../../../javascript/sphinxdoc/1.0/doctools.js debian/python3-dev/usr/share/doc/python3/_static/doctools.js
 	mv debian/python3-dev.substvars.new debian/python3-dev.substvars
 	mv debian/python3-dev.substvars.new debian/python3-dev.substvars
 	mv debian/python3-dev.substvars.new debian/python3-dev.substvars
@@ -986,21 +1022,21 @@
 dpkg-gencontrol: warning: Depends field of package python3-full: substitution variable ${shlibs:Depends} used, but is not defined
 dh_md5sums -a 
 dh_builddeb -a 
-dpkg-deb: building package 'python3-minimal' in '../python3-minimal_3.13.2-2_arm64.deb'.
-dpkg-deb: building package 'python3-dev' in '../python3-dev_3.13.2-2_arm64.deb'.
 dpkg-deb: building package 'python3' in '../python3_3.13.2-2_arm64.deb'.
-dpkg-deb: building package 'libpython3-stdlib' in '../libpython3-stdlib_3.13.2-2_arm64.deb'.
-dpkg-deb: building package 'python3-all-dev' in '../python3-all-dev_3.13.2-2_arm64.deb'.
+dpkg-deb: building package 'python3-dev' in '../python3-dev_3.13.2-2_arm64.deb'.
+dpkg-deb: building package 'python3-minimal' in '../python3-minimal_3.13.2-2_arm64.deb'.
 dpkg-deb: building package 'libpython3-dbg' in '../libpython3-dbg_3.13.2-2_arm64.deb'.
+dpkg-deb: building package 'python3-all-dev' in '../python3-all-dev_3.13.2-2_arm64.deb'.
+dpkg-deb: building package 'libpython3-stdlib' in '../libpython3-stdlib_3.13.2-2_arm64.deb'.
 dpkg-deb: building package 'python3-all-venv' in '../python3-all-venv_3.13.2-2_arm64.deb'.
 dpkg-deb: building package 'libpython3-all-dbg' in '../libpython3-all-dbg_3.13.2-2_arm64.deb'.
 dpkg-deb: building package 'python3-all-dbg' in '../python3-all-dbg_3.13.2-2_arm64.deb'.
 dpkg-deb: building package 'python3-dbg' in '../python3-dbg_3.13.2-2_arm64.deb'.
-dpkg-deb: building package 'python3-nopie' in '../python3-nopie_3.13.2-2_arm64.deb'.
-dpkg-deb: building package 'python3-venv' in '../python3-venv_3.13.2-2_arm64.deb'.
 dpkg-deb: building package 'python3-full' in '../python3-full_3.13.2-2_arm64.deb'.
-dpkg-deb: building package 'libpython3-all-dev' in '../libpython3-all-dev_3.13.2-2_arm64.deb'.
 dpkg-deb: building package 'python3-all' in '../python3-all_3.13.2-2_arm64.deb'.
+dpkg-deb: building package 'libpython3-all-dev' in '../libpython3-all-dev_3.13.2-2_arm64.deb'.
+dpkg-deb: building package 'python3-nopie' in '../python3-nopie_3.13.2-2_arm64.deb'.
+dpkg-deb: building package 'python3-venv' in '../python3-venv_3.13.2-2_arm64.deb'.
 dpkg-deb: building package 'libpython3-dev' in '../libpython3-dev_3.13.2-2_arm64.deb'.
  dpkg-genbuildinfo --build=binary -O../python3-defaults_3.13.2-2_arm64.buildinfo
  dpkg-genchanges --build=binary -O../python3-defaults_3.13.2-2_arm64.changes
@@ -1009,12 +1045,14 @@
 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/674232/tmp/hooks/B01_cleanup starting
+I: user script /srv/workspace/pbuilder/674232/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/2467236 and its subdirectories
-I: Current time: Thu Mar 13 10:51:28 -12 2025
-I: pbuilder-time-stamp: 1741906288
+I: removing directory /srv/workspace/pbuilder/674232 and its subdirectories
+I: Current time: Thu Apr 16 19:15:24 +14 2026
+I: pbuilder-time-stamp: 1776316524