Diff of the two buildlogs:

--
--- b1/build.log	2025-01-08 05:53:59.839717343 +0000
+++ b2/build.log	2025-01-08 05:59:35.564437292 +0000
@@ -1,7 +1,6 @@
-W: cgroups are not available on the host, not using them.
 I: pbuilder: network access will be disabled during build
-I: Current time: Tue Jan  7 17:46:49 -12 2025
-I: pbuilder-time-stamp: 1736315209
+I: Current time: Wed Jan  8 19:54:09 +14 2025
+I: pbuilder-time-stamp: 1736315649
 I: Building the build Environment
 I: extracting base tarball [/var/cache/pbuilder/trixie-reproducible-base.tgz]
 I: copying local configuration
@@ -27,51 +26,84 @@
 dpkg-source: info: unpacking xarray-safe-rcm_2024.11.0-1.debian.tar.xz
 I: Not using root during the build.
 I: Installing the build-deps
-I: user script /srv/workspace/pbuilder/602/tmp/hooks/D02_print_environment starting
+I: user script /srv/workspace/pbuilder/24752/tmp/hooks/D01_modify_environment starting
+debug: Running on virt64c.
+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  8 05:54 /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/24752/tmp/hooks/D01_modify_environment finished
+I: user script /srv/workspace/pbuilder/24752/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='armhf'
-  DEBIAN_FRONTEND='noninteractive'
-  DEB_BUILD_OPTIONS='buildinfo=+all reproducible=+all parallel=3 '
-  DISTRIBUTION='trixie'
-  HOME='/root'
-  HOST_ARCH='armhf'
+  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]="arm-unknown-linux-gnueabihf")
+  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=armhf
+  DEBIAN_FRONTEND=noninteractive
+  DEB_BUILD_OPTIONS='buildinfo=+all reproducible=+all parallel=4 '
+  DIRSTACK=()
+  DISTRIBUTION=trixie
+  EUID=0
+  FUNCNAME=([0]="Echo" [1]="main")
+  GROUPS=()
+  HOME=/root
+  HOSTNAME=i-capture-the-hostname
+  HOSTTYPE=arm
+  HOST_ARCH=armhf
   IFS=' 	
   '
-  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='602'
-  PS1='# '
-  PS2='> '
+  INVOCATION_ID=a222a5eff3884908aab2f20bde95afda
+  LANG=C
+  LANGUAGE=it_CH:it
+  LC_ALL=C
+  MACHTYPE=arm-unknown-linux-gnueabihf
+  MAIL=/var/mail/root
+  OPTERR=1
+  OPTIND=1
+  OSTYPE=linux-gnueabihf
+  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=24752
   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.4uPhD8K1/pbuilderrc_1Chu --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.4uPhD8K1/b1 --logfile b1/build.log xarray-safe-rcm_2024.11.0-1.dsc'
-  SUDO_GID='113'
-  SUDO_UID='107'
-  SUDO_USER='jenkins'
-  TERM='unknown'
-  TZ='/usr/share/zoneinfo/Etc/GMT+12'
-  USER='root'
-  _='/usr/sbin/chroot'
-  http_proxy='http://10.0.0.15:3142/'
+  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.4uPhD8K1/pbuilderrc_kOqh --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.4uPhD8K1/b2 --logfile b2/build.log xarray-safe-rcm_2024.11.0-1.dsc'
+  SUDO_GID=113
+  SUDO_UID=107
+  SUDO_USER=jenkins
+  TERM=unknown
+  TZ=/usr/share/zoneinfo/Etc/GMT-14
+  UID=0
+  USER=root
+  _='I: set'
+  http_proxy=http://10.0.0.15:3142/
 I: uname -a
-  Linux virt32a 6.1.0-28-armmp-lpae #1 SMP Debian 6.1.119-1 (2024-11-22) armv7l GNU/Linux
+  Linux i-capture-the-hostname 6.1.0-28-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/602/tmp/hooks/D02_print_environment finished
+I: user script /srv/workspace/pbuilder/24752/tmp/hooks/D02_print_environment finished
  -> Attempting to satisfy build-dependencies
  -> Creating pbuilder-satisfydepends-dummy package
 Package: pbuilder-satisfydepends-dummy
@@ -347,7 +379,7 @@
 Get: 208 http://deb.debian.org/debian trixie/main armhf python3-setuptools-scm all 8.1.0-1 [40.5 kB]
 Get: 209 http://deb.debian.org/debian trixie/main armhf python3-toolz all 1.0.0-2 [44.2 kB]
 Get: 210 http://deb.debian.org/debian trixie/main armhf python3-xmlschema all 3.4.3-1 [239 kB]
-Fetched 117 MB in 2s (53.2 MB/s)
+Fetched 117 MB in 3s (44.2 MB/s)
 Preconfiguring packages ...
 Selecting previously unselected package libpython3.12-minimal:armhf.
 (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 ... 19693 files and directories currently installed.)
@@ -1031,8 +1063,8 @@
 Setting up tzdata (2024b-4) ...
 
 Current default time zone: 'Etc/UTC'
-Local time is now:      Wed Jan  8 05:49:29 UTC 2025.
-Universal Time is now:  Wed Jan  8 05:49:29 UTC 2025.
+Local time is now:      Wed Jan  8 05:55:49 UTC 2025.
+Universal Time is now:  Wed Jan  8 05:55:49 UTC 2025.
 Run 'dpkg-reconfigure tzdata' if you wish to change it.
 
 Setting up mariadb-common (1:11.4.3-1) ...
@@ -1227,7 +1259,11 @@
 Building tag database...
  -> Finished parsing the build-deps
 I: Building the package
-I: Running cd /build/reproducible-path/xarray-safe-rcm-2024.11.0/ && 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  > ../xarray-safe-rcm_2024.11.0-1_source.changes
+I: user script /srv/workspace/pbuilder/24752/tmp/hooks/A99_set_merged_usr starting
+Not re-configuring usrmerge for trixie
+I: user script /srv/workspace/pbuilder/24752/tmp/hooks/A99_set_merged_usr finished
+hostname: Name or service not known
+I: Running cd /build/reproducible-path/xarray-safe-rcm-2024.11.0/ && 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  > ../xarray-safe-rcm_2024.11.0-1_source.changes
 dpkg-buildpackage: info: source package xarray-safe-rcm
 dpkg-buildpackage: info: source version 2024.11.0-1
 dpkg-buildpackage: info: source distribution unstable
@@ -1252,20 +1288,20 @@
 running build
 running build_py
 creating build/lib/safe_rcm
-copying safe_rcm/api.py -> build/lib/safe_rcm
-copying safe_rcm/xml.py -> build/lib/safe_rcm
 copying safe_rcm/calibrations.py -> build/lib/safe_rcm
+copying safe_rcm/xml.py -> build/lib/safe_rcm
 copying safe_rcm/manifest.py -> build/lib/safe_rcm
+copying safe_rcm/api.py -> build/lib/safe_rcm
 copying safe_rcm/__init__.py -> build/lib/safe_rcm
 creating build/lib/safe_rcm/tests
-copying safe_rcm/tests/test_product_utils.py -> build/lib/safe_rcm/tests
 copying safe_rcm/tests/test_xml.py -> build/lib/safe_rcm/tests
+copying safe_rcm/tests/test_product_utils.py -> build/lib/safe_rcm/tests
 creating build/lib/safe_rcm/product
-copying safe_rcm/product/utils.py -> build/lib/safe_rcm/product
-copying safe_rcm/product/reader.py -> build/lib/safe_rcm/product
-copying safe_rcm/product/predicates.py -> build/lib/safe_rcm/product
 copying safe_rcm/product/transformers.py -> build/lib/safe_rcm/product
 copying safe_rcm/product/dicttoolz.py -> build/lib/safe_rcm/product
+copying safe_rcm/product/reader.py -> build/lib/safe_rcm/product
+copying safe_rcm/product/predicates.py -> build/lib/safe_rcm/product
+copying safe_rcm/product/utils.py -> build/lib/safe_rcm/product
 running egg_info
 creating xarray_safe_rcm.egg-info
 writing xarray_safe_rcm.egg-info/PKG-INFO
@@ -1281,25 +1317,25 @@
 running install_lib
 creating build/bdist.linux-armv7l/wheel
 creating build/bdist.linux-armv7l/wheel/safe_rcm
-copying build/lib/safe_rcm/api.py -> build/bdist.linux-armv7l/wheel/./safe_rcm
+copying build/lib/safe_rcm/calibrations.py -> build/bdist.linux-armv7l/wheel/./safe_rcm
+copying build/lib/safe_rcm/xml.py -> build/bdist.linux-armv7l/wheel/./safe_rcm
 creating build/bdist.linux-armv7l/wheel/safe_rcm/tests
-copying build/lib/safe_rcm/tests/test_product_utils.py -> build/bdist.linux-armv7l/wheel/./safe_rcm/tests
 copying build/lib/safe_rcm/tests/test_xml.py -> build/bdist.linux-armv7l/wheel/./safe_rcm/tests
-copying build/lib/safe_rcm/xml.py -> build/bdist.linux-armv7l/wheel/./safe_rcm
-copying build/lib/safe_rcm/calibrations.py -> build/bdist.linux-armv7l/wheel/./safe_rcm
+copying build/lib/safe_rcm/tests/test_product_utils.py -> build/bdist.linux-armv7l/wheel/./safe_rcm/tests
 copying build/lib/safe_rcm/manifest.py -> build/bdist.linux-armv7l/wheel/./safe_rcm
 creating build/bdist.linux-armv7l/wheel/safe_rcm/product
-copying build/lib/safe_rcm/product/utils.py -> build/bdist.linux-armv7l/wheel/./safe_rcm/product
-copying build/lib/safe_rcm/product/reader.py -> build/bdist.linux-armv7l/wheel/./safe_rcm/product
-copying build/lib/safe_rcm/product/predicates.py -> build/bdist.linux-armv7l/wheel/./safe_rcm/product
 copying build/lib/safe_rcm/product/transformers.py -> build/bdist.linux-armv7l/wheel/./safe_rcm/product
 copying build/lib/safe_rcm/product/dicttoolz.py -> build/bdist.linux-armv7l/wheel/./safe_rcm/product
+copying build/lib/safe_rcm/product/reader.py -> build/bdist.linux-armv7l/wheel/./safe_rcm/product
+copying build/lib/safe_rcm/product/predicates.py -> build/bdist.linux-armv7l/wheel/./safe_rcm/product
+copying build/lib/safe_rcm/product/utils.py -> build/bdist.linux-armv7l/wheel/./safe_rcm/product
+copying build/lib/safe_rcm/api.py -> build/bdist.linux-armv7l/wheel/./safe_rcm
 copying build/lib/safe_rcm/__init__.py -> build/bdist.linux-armv7l/wheel/./safe_rcm
 running install_egg_info
 Copying xarray_safe_rcm.egg-info to build/bdist.linux-armv7l/wheel/./xarray_safe_rcm-2024.11.0.egg-info
 running install_scripts
 creating build/bdist.linux-armv7l/wheel/xarray_safe_rcm-2024.11.0.dist-info/WHEEL
-creating '/build/reproducible-path/xarray-safe-rcm-2024.11.0/.pybuild/cpython3_3.13_safe_rcm/.tmp-zr0pss0q/xarray_safe_rcm-2024.11.0-py3-none-any.whl' and adding 'build/bdist.linux-armv7l/wheel' to it
+creating '/build/reproducible-path/xarray-safe-rcm-2024.11.0/.pybuild/cpython3_3.13_safe_rcm/.tmp-fe4uw1ei/xarray_safe_rcm-2024.11.0-py3-none-any.whl' and adding 'build/bdist.linux-armv7l/wheel' to it
 adding 'safe_rcm/__init__.py'
 adding 'safe_rcm/api.py'
 adding 'safe_rcm/calibrations.py'
@@ -1339,25 +1375,25 @@
 running install_lib
 creating build/bdist.linux-armv7l/wheel
 creating build/bdist.linux-armv7l/wheel/safe_rcm
-copying build/lib/safe_rcm/api.py -> build/bdist.linux-armv7l/wheel/./safe_rcm
+copying build/lib/safe_rcm/calibrations.py -> build/bdist.linux-armv7l/wheel/./safe_rcm
+copying build/lib/safe_rcm/xml.py -> build/bdist.linux-armv7l/wheel/./safe_rcm
 creating build/bdist.linux-armv7l/wheel/safe_rcm/tests
-copying build/lib/safe_rcm/tests/test_product_utils.py -> build/bdist.linux-armv7l/wheel/./safe_rcm/tests
 copying build/lib/safe_rcm/tests/test_xml.py -> build/bdist.linux-armv7l/wheel/./safe_rcm/tests
-copying build/lib/safe_rcm/xml.py -> build/bdist.linux-armv7l/wheel/./safe_rcm
-copying build/lib/safe_rcm/calibrations.py -> build/bdist.linux-armv7l/wheel/./safe_rcm
+copying build/lib/safe_rcm/tests/test_product_utils.py -> build/bdist.linux-armv7l/wheel/./safe_rcm/tests
 copying build/lib/safe_rcm/manifest.py -> build/bdist.linux-armv7l/wheel/./safe_rcm
 creating build/bdist.linux-armv7l/wheel/safe_rcm/product
-copying build/lib/safe_rcm/product/utils.py -> build/bdist.linux-armv7l/wheel/./safe_rcm/product
-copying build/lib/safe_rcm/product/reader.py -> build/bdist.linux-armv7l/wheel/./safe_rcm/product
-copying build/lib/safe_rcm/product/predicates.py -> build/bdist.linux-armv7l/wheel/./safe_rcm/product
 copying build/lib/safe_rcm/product/transformers.py -> build/bdist.linux-armv7l/wheel/./safe_rcm/product
 copying build/lib/safe_rcm/product/dicttoolz.py -> build/bdist.linux-armv7l/wheel/./safe_rcm/product
+copying build/lib/safe_rcm/product/reader.py -> build/bdist.linux-armv7l/wheel/./safe_rcm/product
+copying build/lib/safe_rcm/product/predicates.py -> build/bdist.linux-armv7l/wheel/./safe_rcm/product
+copying build/lib/safe_rcm/product/utils.py -> build/bdist.linux-armv7l/wheel/./safe_rcm/product
+copying build/lib/safe_rcm/api.py -> build/bdist.linux-armv7l/wheel/./safe_rcm
 copying build/lib/safe_rcm/__init__.py -> build/bdist.linux-armv7l/wheel/./safe_rcm
 running install_egg_info
 Copying xarray_safe_rcm.egg-info to build/bdist.linux-armv7l/wheel/./xarray_safe_rcm-2024.11.0.egg-info
 running install_scripts
 creating build/bdist.linux-armv7l/wheel/xarray_safe_rcm-2024.11.0.dist-info/WHEEL
-creating '/build/reproducible-path/xarray-safe-rcm-2024.11.0/.pybuild/cpython3_3.12_safe_rcm/.tmp-nrvxlx1b/xarray_safe_rcm-2024.11.0-py3-none-any.whl' and adding 'build/bdist.linux-armv7l/wheel' to it
+creating '/build/reproducible-path/xarray-safe-rcm-2024.11.0/.pybuild/cpython3_3.12_safe_rcm/.tmp-gx0aqe3z/xarray_safe_rcm-2024.11.0-py3-none-any.whl' and adding 'build/bdist.linux-armv7l/wheel' to it
 adding 'safe_rcm/__init__.py'
 adding 'safe_rcm/api.py'
 adding 'safe_rcm/calibrations.py'
@@ -1390,7 +1426,7 @@
 safe_rcm/tests/test_product_utils.py .                                   [  6%]
 safe_rcm/tests/test_xml.py ...............                               [100%]
 
-====================== 16 passed, 1 deselected in 11.99s =======================
+====================== 16 passed, 1 deselected in 10.75s =======================
 I: pybuild base:311: cd /build/reproducible-path/xarray-safe-rcm-2024.11.0/.pybuild/cpython3_3.12_safe_rcm/build; python3.12 -m pytest -k "not test_strip_namespaces" --pyargs safe_rcm
 ============================= test session starts ==============================
 platform linux -- Python 3.12.8, pytest-8.3.3, pluggy-1.5.0
@@ -1402,7 +1438,7 @@
 safe_rcm/tests/test_product_utils.py .                                   [  6%]
 safe_rcm/tests/test_xml.py ...............                               [100%]
 
-====================== 16 passed, 1 deselected in 14.39s =======================
+====================== 16 passed, 1 deselected in 12.33s =======================
    create-stamp debian/debhelper-build-stamp
    dh_testroot -O--buildsystem=pybuild
    dh_prep -O--buildsystem=pybuild
@@ -1432,12 +1468,14 @@
 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/24752/tmp/hooks/B01_cleanup starting
+I: user script /srv/workspace/pbuilder/24752/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/602 and its subdirectories
-I: Current time: Tue Jan  7 17:53:55 -12 2025
-I: pbuilder-time-stamp: 1736315635
+I: removing directory /srv/workspace/pbuilder/24752 and its subdirectories
+I: Current time: Wed Jan  8 19:59:31 +14 2025
+I: pbuilder-time-stamp: 1736315971