Diff of the two buildlogs:

--
--- b1/build.log	2024-12-05 12:50:59.092623012 +0000
+++ b2/build.log	2024-12-05 12:53:47.948990325 +0000
@@ -1,6 +1,6 @@
 I: pbuilder: network access will be disabled during build
-I: Current time: Thu Dec  5 00:47:44 -12 2024
-I: pbuilder-time-stamp: 1733402864
+I: Current time: Fri Dec  6 02:51:01 +14 2024
+I: pbuilder-time-stamp: 1733403061
 I: Building the build Environment
 I: extracting base tarball [/var/cache/pbuilder/unstable-reproducible-base.tgz]
 I: copying local configuration
@@ -28,52 +28,84 @@
 dpkg-source: info: applying sphinx-use-rtd-theme.patch
 I: Not using root during the build.
 I: Installing the build-deps
-I: user script /srv/workspace/pbuilder/2385541/tmp/hooks/D02_print_environment starting
+I: user script /srv/workspace/pbuilder/2737196/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 Dec  5 12:51 /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/2737196/tmp/hooks/D01_modify_environment finished
+I: user script /srv/workspace/pbuilder/2737196/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]="32" [3]="1" [4]="release" [5]="aarch64-unknown-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=arm64
+  DEBIAN_FRONTEND=noninteractive
   DEB_BUILD_OPTIONS='buildinfo=+all reproducible=+all parallel=12 '
-  DISTRIBUTION='unstable'
-  HOME='/root'
-  HOST_ARCH='arm64'
+  DIRSTACK=()
+  DISTRIBUTION=unstable
+  EUID=0
+  FUNCNAME=([0]="Echo" [1]="main")
+  GROUPS=()
+  HOME=/root
+  HOSTNAME=i-capture-the-hostname
+  HOSTTYPE=aarch64
+  HOST_ARCH=arm64
   IFS=' 	
   '
-  INVOCATION_ID='2c68775a95d748b0ab30a04410e78007'
-  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='2385541'
-  PS1='# '
-  PS2='> '
+  INVOCATION_ID=0b47b295760a41ec9a801f1c6170c71f
+  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=2737196
   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.Lz63Rid9/pbuilderrc_ufKG --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.Lz63Rid9/b1 --logfile b1/build.log python-openapi-core_0.19.4-1.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.Lz63Rid9/pbuilderrc_zHMo --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.Lz63Rid9/b2 --logfile b2/build.log python-openapi-core_0.19.4-1.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 codethink04-arm64 6.1.0-28-cloud-arm64 #1 SMP Debian 6.1.119-1 (2024-11-22) aarch64 GNU/Linux
+  Linux i-capture-the-hostname 6.1.0-28-cloud-arm64 #1 SMP Debian 6.1.119-1 (2024-11-22) aarch64 GNU/Linux
 I: ls -l /bin
   lrwxrwxrwx 1 root root 7 Nov 22 14:40 /bin -> usr/bin
-I: user script /srv/workspace/pbuilder/2385541/tmp/hooks/D02_print_environment finished
+I: user script /srv/workspace/pbuilder/2737196/tmp/hooks/D02_print_environment finished
  -> Attempting to satisfy build-dependencies
  -> Creating pbuilder-satisfydepends-dummy package
 Package: pbuilder-satisfydepends-dummy
@@ -358,7 +390,7 @@
 Get: 185 http://deb.debian.org/debian unstable/main arm64 python3-sphinxcontrib.jquery all 4.1-5 [7348 B]
 Get: 186 http://deb.debian.org/debian unstable/main arm64 python3-sphinx-rtd-theme all 3.0.2+dfsg-1 [29.5 kB]
 Get: 187 http://deb.debian.org/debian unstable/main arm64 python3-strict-rfc3339 all 0.7-2 [8828 B]
-Fetched 61.1 MB in 0s (150 MB/s)
+Fetched 61.1 MB in 0s (180 MB/s)
 debconf: delaying package configuration, since apt-utils is not installed
 Selecting previously unselected package fonts-lato.
 (Reading database ... 
(Reading database ... 5%
(Reading database ... 10%
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(Reading database ... 70%
(Reading database ... 75%
(Reading database ... 80%
(Reading database ... 85%
(Reading database ... 90%
(Reading database ... 95%
(Reading database ... 100%
(Reading database ... 20087 files and directories currently installed.)
@@ -959,8 +991,8 @@
 Setting up tzdata (2024b-4) ...
 
 Current default time zone: 'Etc/UTC'
-Local time is now:      Thu Dec  5 12:48:25 UTC 2024.
-Universal Time is now:  Thu Dec  5 12:48:25 UTC 2024.
+Local time is now:      Thu Dec  5 12:51:25 UTC 2024.
+Universal Time is now:  Thu Dec  5 12:51:25 UTC 2024.
 Run 'dpkg-reconfigure tzdata' if you wish to change it.
 
 Setting up libpython3.13-minimal:arm64 (3.13.1-1) ...
@@ -1145,7 +1177,11 @@
 Building tag database...
  -> Finished parsing the build-deps
 I: Building the package
-I: Running cd /build/reproducible-path/python-openapi-core-0.19.4/ && 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  > ../python-openapi-core_0.19.4-1_source.changes
+I: user script /srv/workspace/pbuilder/2737196/tmp/hooks/A99_set_merged_usr starting
+Not re-configuring usrmerge for unstable
+I: user script /srv/workspace/pbuilder/2737196/tmp/hooks/A99_set_merged_usr finished
+hostname: Name or service not known
+I: Running cd /build/reproducible-path/python-openapi-core-0.19.4/ && 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  > ../python-openapi-core_0.19.4-1_source.changes
 dpkg-buildpackage: info: source package python-openapi-core
 dpkg-buildpackage: info: source version 0.19.4-1
 dpkg-buildpackage: info: source distribution unstable
@@ -2914,7 +2950,7 @@
 TOTAL                                                      4317    323   1053    101    92%
 Coverage XML written to file reports/coverage.xml
 
-================= 1424 passed, 2 skipped, 20 xfailed in 27.28s =================
+================= 1424 passed, 2 skipped, 20 xfailed in 25.83s =================
 I: pybuild base:311: cd /build/reproducible-path/python-openapi-core-0.19.4/.pybuild/cpython3_3.12_openapi-core/build; python3.12 -m pytest -W ignore::ResourceWarning
 /usr/lib/python3/dist-packages/pytest_asyncio/plugin.py:208: PytestDeprecationWarning: The configuration option "asyncio_default_fixture_loop_scope" is unset.
 The event loop scope for asynchronous fixtures will default to the fixture caching scope. Future versions of pytest-asyncio will default the loop scope for asynchronous fixtures to function scope. Set the default fixture loop scope explicitly in order to avoid unexpected behavior in the future. Valid fixture loop scopes are: "function", "class", "module", "package", "session"
@@ -4570,7 +4606,7 @@
 TOTAL                                                      4317    323   1053    101    92%
 Coverage XML written to file reports/coverage.xml
 
-================= 1424 passed, 2 skipped, 20 xfailed in 31.96s =================
+================= 1424 passed, 2 skipped, 20 xfailed in 31.24s =================
    create-stamp debian/debhelper-build-stamp
    dh_testroot -O--buildsystem=pybuild
    dh_prep -O--buildsystem=pybuild
@@ -4598,8 +4634,8 @@
    dh_gencontrol -O--buildsystem=pybuild
    dh_md5sums -O--buildsystem=pybuild
    dh_builddeb -O--buildsystem=pybuild
-dpkg-deb: building package 'python-openapi-core-doc' in '../python-openapi-core-doc_0.19.4-1_all.deb'.
 dpkg-deb: building package 'python3-openapi-core' in '../python3-openapi-core_0.19.4-1_all.deb'.
+dpkg-deb: building package 'python-openapi-core-doc' in '../python-openapi-core-doc_0.19.4-1_all.deb'.
  dpkg-genbuildinfo --build=binary -O../python-openapi-core_0.19.4-1_arm64.buildinfo
  dpkg-genchanges --build=binary -O../python-openapi-core_0.19.4-1_arm64.changes
 dpkg-genchanges: info: binary-only upload (no source code included)
@@ -4608,12 +4644,14 @@
 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/2737196/tmp/hooks/B01_cleanup starting
+I: user script /srv/workspace/pbuilder/2737196/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/2385541 and its subdirectories
-I: Current time: Thu Dec  5 00:50:58 -12 2024
-I: pbuilder-time-stamp: 1733403058
+I: removing directory /srv/workspace/pbuilder/2737196 and its subdirectories
+I: Current time: Fri Dec  6 02:53:46 +14 2024
+I: pbuilder-time-stamp: 1733403226