Diff of the two buildlogs:

--
--- b1/build.log	2025-03-05 00:34:51.130805448 +0000
+++ b2/build.log	2025-03-05 00:45:38.853775878 +0000
@@ -1,6 +1,6 @@
 I: pbuilder: network access will be disabled during build
-I: Current time: Tue Mar  4 12:15:54 -12 2025
-I: pbuilder-time-stamp: 1741133754
+I: Current time: Wed Mar  5 14:35:02 +14 2025
+I: pbuilder-time-stamp: 1741134902
 I: Building the build Environment
 I: extracting base tarball [/var/cache/pbuilder/trixie-reproducible-base.tgz]
 I: copying local configuration
@@ -28,52 +28,84 @@
 dpkg-source: info: applying test_read_log_numpy2.patch
 I: Not using root during the build.
 I: Installing the build-deps
-I: user script /srv/workspace/pbuilder/6732/tmp/hooks/D02_print_environment starting
+I: user script /srv/workspace/pbuilder/29206/tmp/hooks/D01_modify_environment starting
+debug: Running on ff64a.
+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 Mar  5 00:35 /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/29206/tmp/hooks/D01_modify_environment finished
+I: user script /srv/workspace/pbuilder/29206/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=6 '
+  DIRSTACK=()
+  DISTRIBUTION=trixie
+  EUID=0
+  FUNCNAME=([0]="Echo" [1]="main")
+  GROUPS=()
+  HOME=/root
+  HOSTNAME=i-capture-the-hostname
+  HOSTTYPE=arm
+  HOST_ARCH=armhf
   IFS=' 	
   '
-  INVOCATION_ID='d3e4b1b17e434dbc8f9b24790c065429'
-  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='6732'
-  PS1='# '
-  PS2='> '
+  INVOCATION_ID=6c3b15a8046944388c63f5ab5bccbb16
+  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=29206
   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.hQiaXtfU/pbuilderrc_LUEu --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.hQiaXtfU/b1 --logfile b1/build.log python-gsd_3.4.2-2.dsc'
-  SUDO_GID='113'
-  SUDO_UID='107'
-  SUDO_USER='jenkins'
-  TERM='unknown'
-  TZ='/usr/share/zoneinfo/Etc/GMT+12'
-  USER='root'
-  _='/usr/bin/systemd-run'
-  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.hQiaXtfU/pbuilderrc_Yh9P --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.hQiaXtfU/b2 --logfile b2/build.log python-gsd_3.4.2-2.dsc'
+  SUDO_GID=114
+  SUDO_UID=109
+  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 cbxi4a 6.1.0-23-armmp #1 SMP Debian 6.1.99-1 (2024-07-15) armv7l GNU/Linux
+  Linux i-capture-the-hostname 6.1.0-31-arm64 #1 SMP Debian 6.1.128-1 (2025-02-07) 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/6732/tmp/hooks/D02_print_environment finished
+I: user script /srv/workspace/pbuilder/29206/tmp/hooks/D02_print_environment finished
  -> Attempting to satisfy build-dependencies
  -> Creating pbuilder-satisfydepends-dummy package
 Package: pbuilder-satisfydepends-dummy
@@ -370,7 +402,7 @@
 Get: 219 http://deb.debian.org/debian trixie/main armhf sphinx-rtd-theme-common all 3.0.2+dfsg-2 [1023 kB]
 Get: 220 http://deb.debian.org/debian trixie/main armhf python3-sphinxcontrib.jquery all 4.1-5 [7348 B]
 Get: 221 http://deb.debian.org/debian trixie/main armhf python3-sphinx-rtd-theme all 3.0.2+dfsg-2 [29.7 kB]
-Fetched 170 MB in 9s (19.4 MB/s)
+Fetched 170 MB in 5s (37.0 MB/s)
 Preconfiguring packages ...
 Selecting previously unselected package fonts-lato.
 (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 ... 19527 files and directories currently installed.)
@@ -1085,8 +1117,8 @@
 Setting up tzdata (2025a-2) ...
 
 Current default time zone: 'Etc/UTC'
-Local time is now:      Wed Mar  5 00:19:27 UTC 2025.
-Universal Time is now:  Wed Mar  5 00:19:27 UTC 2025.
+Local time is now:      Wed Mar  5 00:37:53 UTC 2025.
+Universal Time is now:  Wed Mar  5 00:37:53 UTC 2025.
 Run 'dpkg-reconfigure tzdata' if you wish to change it.
 
 Setting up autotools-dev (20220109.1) ...
@@ -1297,7 +1329,11 @@
 Building tag database...
  -> Finished parsing the build-deps
 I: Building the package
-I: Running cd /build/reproducible-path/python-gsd-3.4.2/ && 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  > ../python-gsd_3.4.2-2_source.changes
+I: user script /srv/workspace/pbuilder/29206/tmp/hooks/A99_set_merged_usr starting
+Not re-configuring usrmerge for trixie
+I: user script /srv/workspace/pbuilder/29206/tmp/hooks/A99_set_merged_usr finished
+hostname: Name or service not known
+I: Running cd /build/reproducible-path/python-gsd-3.4.2/ && 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  > ../python-gsd_3.4.2-2_source.changes
 dpkg-buildpackage: info: source package python-gsd
 dpkg-buildpackage: info: source version 3.4.2-2
 dpkg-buildpackage: info: source distribution unstable
@@ -1331,11 +1367,11 @@
 running build
 running build_py
 creating build/lib.linux-armv7l-cpython-313/gsd
-copying gsd/pytest_plugin_validate.py -> build/lib.linux-armv7l-cpython-313/gsd
 copying gsd/hoomd.py -> build/lib.linux-armv7l-cpython-313/gsd
 copying gsd/__init__.py -> build/lib.linux-armv7l-cpython-313/gsd
-copying gsd/__main__.py -> build/lib.linux-armv7l-cpython-313/gsd
 copying gsd/version.py -> build/lib.linux-armv7l-cpython-313/gsd
+copying gsd/pytest_plugin_validate.py -> build/lib.linux-armv7l-cpython-313/gsd
+copying gsd/__main__.py -> build/lib.linux-armv7l-cpython-313/gsd
 copying gsd/pygsd.py -> build/lib.linux-armv7l-cpython-313/gsd
 copying gsd/conftest.py -> build/lib.linux-armv7l-cpython-313/gsd
 creating build/lib.linux-armv7l-cpython-313/gsd/test
@@ -1378,31 +1414,31 @@
 running install_lib
 creating build/bdist.linux-armv7l/wheel
 creating build/bdist.linux-armv7l/wheel/gsd
-copying build/lib.linux-armv7l-cpython-313/gsd/pytest_plugin_validate.py -> build/bdist.linux-armv7l/wheel/./gsd
-copying build/lib.linux-armv7l-cpython-313/gsd/libgsd.pxd -> build/bdist.linux-armv7l/wheel/./gsd
+copying build/lib.linux-armv7l-cpython-313/gsd/fl.pyx -> build/bdist.linux-armv7l/wheel/./gsd
+copying build/lib.linux-armv7l-cpython-313/gsd/fl.c -> build/bdist.linux-armv7l/wheel/./gsd
 copying build/lib.linux-armv7l-cpython-313/gsd/gsd.h -> build/bdist.linux-armv7l/wheel/./gsd
-copying build/lib.linux-armv7l-cpython-313/gsd/fl.cpython-313-arm-linux-gnueabihf.so -> build/bdist.linux-armv7l/wheel/./gsd
-copying build/lib.linux-armv7l-cpython-313/gsd/gsd.c -> build/bdist.linux-armv7l/wheel/./gsd
 copying build/lib.linux-armv7l-cpython-313/gsd/hoomd.py -> build/bdist.linux-armv7l/wheel/./gsd
+copying build/lib.linux-armv7l-cpython-313/gsd/fl.cpython-313-arm-linux-gnueabihf.so -> build/bdist.linux-armv7l/wheel/./gsd
 copying build/lib.linux-armv7l-cpython-313/gsd/__init__.py -> build/bdist.linux-armv7l/wheel/./gsd
+copying build/lib.linux-armv7l-cpython-313/gsd/version.py -> build/bdist.linux-armv7l/wheel/./gsd
+copying build/lib.linux-armv7l-cpython-313/gsd/pytest_plugin_validate.py -> build/bdist.linux-armv7l/wheel/./gsd
+copying build/lib.linux-armv7l-cpython-313/gsd/__main__.py -> build/bdist.linux-armv7l/wheel/./gsd
 creating build/bdist.linux-armv7l/wheel/gsd/test
+copying build/lib.linux-armv7l-cpython-313/gsd/test/pytest.ini -> build/bdist.linux-armv7l/wheel/./gsd/test
 copying build/lib.linux-armv7l-cpython-313/gsd/test/test_largefile.py -> build/bdist.linux-armv7l/wheel/./gsd/test
 copying build/lib.linux-armv7l-cpython-313/gsd/test/test_gsd_v1.gsd -> build/bdist.linux-armv7l/wheel/./gsd/test
 copying build/lib.linux-armv7l-cpython-313/gsd/test/test_hoomd.py -> build/bdist.linux-armv7l/wheel/./gsd/test
-copying build/lib.linux-armv7l-cpython-313/gsd/test/pytest.ini -> build/bdist.linux-armv7l/wheel/./gsd/test
 copying build/lib.linux-armv7l-cpython-313/gsd/test/test_fl.py -> build/bdist.linux-armv7l/wheel/./gsd/test
 copying build/lib.linux-armv7l-cpython-313/gsd/test/conftest.py -> build/bdist.linux-armv7l/wheel/./gsd/test
-copying build/lib.linux-armv7l-cpython-313/gsd/fl.pyx -> build/bdist.linux-armv7l/wheel/./gsd
-copying build/lib.linux-armv7l-cpython-313/gsd/fl.c -> build/bdist.linux-armv7l/wheel/./gsd
-copying build/lib.linux-armv7l-cpython-313/gsd/__main__.py -> build/bdist.linux-armv7l/wheel/./gsd
-copying build/lib.linux-armv7l-cpython-313/gsd/version.py -> build/bdist.linux-armv7l/wheel/./gsd
 copying build/lib.linux-armv7l-cpython-313/gsd/pygsd.py -> build/bdist.linux-armv7l/wheel/./gsd
+copying build/lib.linux-armv7l-cpython-313/gsd/libgsd.pxd -> build/bdist.linux-armv7l/wheel/./gsd
 copying build/lib.linux-armv7l-cpython-313/gsd/conftest.py -> build/bdist.linux-armv7l/wheel/./gsd
+copying build/lib.linux-armv7l-cpython-313/gsd/gsd.c -> build/bdist.linux-armv7l/wheel/./gsd
 running install_egg_info
 Copying gsd.egg-info to build/bdist.linux-armv7l/wheel/./gsd-3.4.2.egg-info
 running install_scripts
 creating build/bdist.linux-armv7l/wheel/gsd-3.4.2.dist-info/WHEEL
-creating '/build/reproducible-path/python-gsd-3.4.2/.pybuild/cpython3_3.13_gsd/.tmp-8gvgrbas/gsd-3.4.2-cp313-cp313-linux_armv7l.whl' and adding 'build/bdist.linux-armv7l/wheel' to it
+creating '/build/reproducible-path/python-gsd-3.4.2/.pybuild/cpython3_3.13_gsd/.tmp-asa_ry3e/gsd-3.4.2-cp313-cp313-linux_armv7l.whl' and adding 'build/bdist.linux-armv7l/wheel' to it
 adding 'gsd/__init__.py'
 adding 'gsd/__main__.py'
 adding 'gsd/conftest.py'
@@ -1593,7 +1629,7 @@
 reading sources... [ 27%] credits
 reading sources... [ 32%] file-layer
 reading sources... [ 36%] fl-examples
-/usr/lib/python3/dist-packages/IPython/paths.py:69: UserWarning: IPython parent '/nonexistent/first-build' is not a writable location, using a temp directory.
+/usr/lib/python3/dist-packages/IPython/paths.py:69: UserWarning: IPython parent '/nonexistent/second-build' is not a writable location, using a temp directory.
   warn("IPython parent '{0}' is not a writable location,"
 /usr/lib/python3/dist-packages/IPython/core/magics/osm.py:761: UserWarning: This is now an optional IPython functionality, using bookmarks requires you to install the `pickleshare` library.
   bkms = self.shell.db.get('bookmarks',{})
@@ -1826,9 +1862,9 @@
 preparing documents... done
 copying assets... 
 copying static files... 
-Writing evaluated template result to /build/reproducible-path/python-gsd-3.4.2/.pybuild/html/_static/language_data.js
 Writing evaluated template result to /build/reproducible-path/python-gsd-3.4.2/.pybuild/html/_static/documentation_options.js
 Writing evaluated template result to /build/reproducible-path/python-gsd-3.4.2/.pybuild/html/_static/basic.css
+Writing evaluated template result to /build/reproducible-path/python-gsd-3.4.2/.pybuild/html/_static/language_data.js
 Writing evaluated template result to /build/reproducible-path/python-gsd-3.4.2/.pybuild/html/_static/copybutton.js
 copying static files: done
 copying extra files... 
@@ -1898,7 +1934,7 @@
     warnings.warn(
 
 -- Docs: https://docs.pytest.org/en/stable/how-to/capture-warnings.html
-================= 134 passed, 3 warnings in 240.93s (0:04:00) ==================
+================= 134 passed, 3 warnings in 116.04s (0:01:56) ==================
    create-stamp debian/debhelper-build-stamp
    dh_testroot -O--buildsystem=pybuild
    dh_prep -O--buildsystem=pybuild
@@ -1907,9 +1943,9 @@
    dh_installdocs -O--buildsystem=pybuild
 dh_installdocs: warning: Cannot auto-detect main package for python-gsd-doc.  If the default is wrong, please use --doc-main-package
    dh_sphinxdoc -O--buildsystem=pybuild
-dh_sphinxdoc: warning: ignoring unknown JavaScript code: debian/python-gsd-doc/usr/share/doc/python-gsd-doc/html/_static/copybutton_funcs.js
-dh_sphinxdoc: warning: ignoring unknown JavaScript code: debian/python-gsd-doc/usr/share/doc/python-gsd-doc/html/_static/copybutton.js
 dh_sphinxdoc: warning: ignoring unknown JavaScript code: debian/python-gsd-doc/usr/share/doc/python-gsd-doc/html/_static/clipboard.min.js
+dh_sphinxdoc: warning: ignoring unknown JavaScript code: debian/python-gsd-doc/usr/share/doc/python-gsd-doc/html/_static/copybutton.js
+dh_sphinxdoc: warning: ignoring unknown JavaScript code: debian/python-gsd-doc/usr/share/doc/python-gsd-doc/html/_static/copybutton_funcs.js
    dh_installchangelogs -O--buildsystem=pybuild
    dh_installman -O--buildsystem=pybuild
    dh_python3 -O--buildsystem=pybuild
@@ -1938,9 +1974,9 @@
 dpkg-gencontrol: warning: package python-gsd-doc: substitution variable ${sphinxdoc:Built-Using} unused, but is defined
    dh_md5sums -O--buildsystem=pybuild
    dh_builddeb -O--buildsystem=pybuild
+dpkg-deb: building package 'python-gsd-doc' in '../python-gsd-doc_3.4.2-2_all.deb'.
 dpkg-deb: building package 'python3-gsd-dbgsym' in '../python3-gsd-dbgsym_3.4.2-2_armhf.deb'.
 dpkg-deb: building package 'python3-gsd' in '../python3-gsd_3.4.2-2_armhf.deb'.
-dpkg-deb: building package 'python-gsd-doc' in '../python-gsd-doc_3.4.2-2_all.deb'.
  dpkg-genbuildinfo --build=binary -O../python-gsd_3.4.2-2_armhf.buildinfo
  dpkg-genchanges --build=binary -O../python-gsd_3.4.2-2_armhf.changes
 dpkg-genchanges: info: binary-only upload (no source code included)
@@ -1949,12 +1985,14 @@
 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/29206/tmp/hooks/B01_cleanup starting
+I: user script /srv/workspace/pbuilder/29206/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/6732 and its subdirectories
-I: Current time: Tue Mar  4 12:34:46 -12 2025
-I: pbuilder-time-stamp: 1741134886
+I: removing directory /srv/workspace/pbuilder/29206 and its subdirectories
+I: Current time: Wed Mar  5 14:45:34 +14 2025
+I: pbuilder-time-stamp: 1741135534