Diff of the two buildlogs:

--
--- b1/build.log	2025-02-21 13:11:38.985832353 +0000
+++ b2/build.log	2025-02-21 13:13:06.313893809 +0000
@@ -1,6 +1,6 @@
 I: pbuilder: network access will be disabled during build
-I: Current time: Thu Mar 26 07:31:23 -12 2026
-I: pbuilder-time-stamp: 1774553483
+I: Current time: Sat Feb 22 03:11:42 +14 2025
+I: pbuilder-time-stamp: 1740143502
 I: Building the build Environment
 I: extracting base tarball [/var/cache/pbuilder/unstable-reproducible-base.tgz]
 I: copying local configuration
@@ -24,52 +24,84 @@
 dpkg-source: info: applying doc_no_sphinx_book_theme.patch
 I: using fakeroot in build.
 I: Installing the build-deps
-I: user script /srv/workspace/pbuilder/3524147/tmp/hooks/D02_print_environment starting
+I: user script /srv/workspace/pbuilder/1467025/tmp/hooks/D01_modify_environment starting
+debug: Running on codethink04-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 Feb 21 13:11 /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/1467025/tmp/hooks/D01_modify_environment finished
+I: user script /srv/workspace/pbuilder/1467025/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='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='272259462c624962aca13e12fb2ff0e6'
-  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='3524147'
-  PS1='# '
-  PS2='> '
+  INVOCATION_ID=30ac8c21abd6477f819a4604360f437c
+  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=1467025
   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.KYp52n69/pbuilderrc_OCVm --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.KYp52n69/b1 --logfile b1/build.log python-h5netcdf_1.5.0-1.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.KYp52n69/pbuilderrc_90To --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.KYp52n69/b2 --logfile b2/build.log python-h5netcdf_1.5.0-1.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 codethink03-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 Nov 22  2024 /bin -> usr/bin
-I: user script /srv/workspace/pbuilder/3524147/tmp/hooks/D02_print_environment finished
+  lrwxrwxrwx 1 root root 7 Nov 22 14:40 /bin -> usr/bin
+I: user script /srv/workspace/pbuilder/1467025/tmp/hooks/D02_print_environment finished
  -> Attempting to satisfy build-dependencies
  -> Creating pbuilder-satisfydepends-dummy package
 Package: pbuilder-satisfydepends-dummy
@@ -266,7 +298,7 @@
 Get: 139 http://deb.debian.org/debian unstable/main arm64 python3-snowballstemmer all 2.2.0-4 [58.0 kB]
 Get: 140 http://deb.debian.org/debian unstable/main arm64 sphinx-common all 8.1.3-5 [617 kB]
 Get: 141 http://deb.debian.org/debian unstable/main arm64 python3-sphinx all 8.1.3-5 [468 kB]
-Fetched 60.1 MB in 1s (94.2 MB/s)
+Fetched 60.1 MB in 0s (157 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 ... 19912 files and directories currently installed.)
@@ -729,8 +761,8 @@
 Setting up tzdata (2025a-2) ...
 
 Current default time zone: 'Etc/UTC'
-Local time is now:      Thu Mar 26 19:32:21 UTC 2026.
-Universal Time is now:  Thu Mar 26 19:32:21 UTC 2026.
+Local time is now:      Fri Feb 21 13:12:05 UTC 2025.
+Universal Time is now:  Fri Feb 21 13:12:05 UTC 2025.
 Run 'dpkg-reconfigure tzdata' if you wish to change it.
 
 Setting up autotools-dev (20220109.1) ...
@@ -876,7 +908,11 @@
 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/python-h5netcdf-1.5.0/ && 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  > ../python-h5netcdf_1.5.0-1_source.changes
+I: user script /srv/workspace/pbuilder/1467025/tmp/hooks/A99_set_merged_usr starting
+Not re-configuring usrmerge for unstable
+I: user script /srv/workspace/pbuilder/1467025/tmp/hooks/A99_set_merged_usr finished
+hostname: Name or service not known
+I: Running cd /build/reproducible-path/python-h5netcdf-1.5.0/ && 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  > ../python-h5netcdf_1.5.0-1_source.changes
 dpkg-buildpackage: info: source package python-h5netcdf
 dpkg-buildpackage: info: source version 1.5.0-1
 dpkg-buildpackage: info: source distribution unstable
@@ -946,7 +982,7 @@
 Copying h5netcdf.egg-info to build/bdist.linux-aarch64/wheel/./h5netcdf-1.5.0.egg-info
 running install_scripts
 creating build/bdist.linux-aarch64/wheel/h5netcdf-1.5.0.dist-info/WHEEL
-creating '/build/reproducible-path/python-h5netcdf-1.5.0/.pybuild/cpython3_3.12_h5netcdf/.tmp-wemryq31/h5netcdf-1.5.0-py3-none-any.whl' and adding 'build/bdist.linux-aarch64/wheel' to it
+creating '/build/reproducible-path/python-h5netcdf-1.5.0/.pybuild/cpython3_3.12_h5netcdf/.tmp-9fy5a8fm/h5netcdf-1.5.0-py3-none-any.whl' and adding 'build/bdist.linux-aarch64/wheel' to it
 adding 'h5netcdf/__init__.py'
 adding 'h5netcdf/_version.py'
 adding 'h5netcdf/attrs.py'
@@ -1002,7 +1038,7 @@
 Copying h5netcdf.egg-info to build/bdist.linux-aarch64/wheel/./h5netcdf-1.5.0.egg-info
 running install_scripts
 creating build/bdist.linux-aarch64/wheel/h5netcdf-1.5.0.dist-info/WHEEL
-creating '/build/reproducible-path/python-h5netcdf-1.5.0/.pybuild/cpython3_3.13_h5netcdf/.tmp-m6l8wofq/h5netcdf-1.5.0-py3-none-any.whl' and adding 'build/bdist.linux-aarch64/wheel' to it
+creating '/build/reproducible-path/python-h5netcdf-1.5.0/.pybuild/cpython3_3.13_h5netcdf/.tmp-_khmvmr7/h5netcdf-1.5.0-py3-none-any.whl' and adding 'build/bdist.linux-aarch64/wheel' to it
 adding 'h5netcdf/__init__.py'
 adding 'h5netcdf/_version.py'
 adding 'h5netcdf/attrs.py'
@@ -1031,26 +1067,26 @@
 [autosummary] generating autosummary for: api.rst, changelog.rst, devguide.rst, feature.rst, index.rst, legacyapi.rst
 WARNING: [autosummary] failed to import h5netcdf.CompoundType.
 Possible hints:
-* AttributeError: module 'h5netcdf' has no attribute 'CompoundType'
 * ModuleNotFoundError: No module named 'h5netcdf.CompoundType'
 * ImportError: 
+* AttributeError: module 'h5netcdf' has no attribute 'CompoundType'
 WARNING: [autosummary] failed to import h5netcdf.EnumType.
 Possible hints:
 * AttributeError: module 'h5netcdf' has no attribute 'EnumType'
-* ModuleNotFoundError: No module named 'h5netcdf.EnumType'
 * ImportError: 
+* ModuleNotFoundError: No module named 'h5netcdf.EnumType'
 WARNING: [autosummary] failed to import h5netcdf.VLType.
 Possible hints:
-* AttributeError: module 'h5netcdf' has no attribute 'VLType'
-* ModuleNotFoundError: No module named 'h5netcdf.VLType'
 * ImportError: 
+* ModuleNotFoundError: No module named 'h5netcdf.VLType'
+* AttributeError: module 'h5netcdf' has no attribute 'VLType'
 [autosummary] generating autosummary for: /build/reproducible-path/python-h5netcdf-1.5.0/doc/generated/h5netcdf.Dimension.rst, /build/reproducible-path/python-h5netcdf-1.5.0/doc/generated/h5netcdf.File.create_group.rst, /build/reproducible-path/python-h5netcdf-1.5.0/doc/generated/h5netcdf.File.create_variable.rst, /build/reproducible-path/python-h5netcdf-1.5.0/doc/generated/h5netcdf.File.resize_dimension.rst, /build/reproducible-path/python-h5netcdf-1.5.0/doc/generated/h5netcdf.File.rst, /build/reproducible-path/python-h5netcdf-1.5.0/doc/generated/h5netcdf.Group.rst, /build/reproducible-path/python-h5netcdf-1.5.0/doc/generated/h5netcdf.Variable.rst, /build/reproducible-path/python-h5netcdf-1.5.0/doc/generated/h5netcdf.legacyapi.CompoundType.rst, /build/reproducible-path/python-h5netcdf-1.5.0/doc/generated/h5netcdf.legacyapi.Dataset.createDimension.rst, /build/reproducible-path/python-h5netcdf-1.5.0/doc/generated/h5netcdf.legacyapi.Dataset.createGroup.rst, /build/reproducible-path/python-h5netcdf-1.5.0/doc/generated/h5netcdf.legacyapi.Dataset.createVariable.rst, /build/reproducible-path/python-h5netcdf-1.5.0/doc/generated/h5netcdf.legacyapi.Dataset.rst, /build/reproducible-path/python-h5netcdf-1.5.0/doc/generated/h5netcdf.legacyapi.Dimension.rst, /build/reproducible-path/python-h5netcdf-1.5.0/doc/generated/h5netcdf.legacyapi.EnumType.rst, /build/reproducible-path/python-h5netcdf-1.5.0/doc/generated/h5netcdf.legacyapi.Group.rst, /build/reproducible-path/python-h5netcdf-1.5.0/doc/generated/h5netcdf.legacyapi.VLType.rst, /build/reproducible-path/python-h5netcdf-1.5.0/doc/generated/h5netcdf.legacyapi.Variable.rst
 loading intersphinx inventory 'python' from https://docs.python.org/3/objects.inv ...
 WARNING: failed to reach any of the inventories with the following issues:
-intersphinx inventory 'https://docs.python.org/3/objects.inv' not fetchable due to <class 'requests.exceptions.ConnectionError'>: HTTPSConnectionPool(host='docs.python.org', port=443): Max retries exceeded with url: /3/objects.inv (Caused by NameResolutionError("<urllib3.connection.HTTPSConnection object at 0xffff85effcb0>: Failed to resolve 'docs.python.org' ([Errno -3] Temporary failure in name resolution)"))
+intersphinx inventory 'https://docs.python.org/3/objects.inv' not fetchable due to <class 'requests.exceptions.ConnectionError'>: HTTPSConnectionPool(host='docs.python.org', port=443): Max retries exceeded with url: /3/objects.inv (Caused by NameResolutionError("<urllib3.connection.HTTPSConnection object at 0xffff86c1fcb0>: Failed to resolve 'docs.python.org' ([Errno -3] Temporary failure in name resolution)"))
 loading intersphinx inventory 'numpy' from https://numpy.org/doc/stable/objects.inv ...
 WARNING: failed to reach any of the inventories with the following issues:
-intersphinx inventory 'https://numpy.org/doc/stable/objects.inv' not fetchable due to <class 'requests.exceptions.ConnectionError'>: HTTPSConnectionPool(host='numpy.org', port=443): Max retries exceeded with url: /doc/stable/objects.inv (Caused by NameResolutionError("<urllib3.connection.HTTPSConnection object at 0xffff85bf4f50>: Failed to resolve 'numpy.org' ([Errno -3] Temporary failure in name resolution)"))
+intersphinx inventory 'https://numpy.org/doc/stable/objects.inv' not fetchable due to <class 'requests.exceptions.ConnectionError'>: HTTPSConnectionPool(host='numpy.org', port=443): Max retries exceeded with url: /doc/stable/objects.inv (Caused by NameResolutionError("<urllib3.connection.HTTPSConnection object at 0xffff868f8f50>: Failed to resolve 'numpy.org' ([Errno -3] Temporary failure in name resolution)"))
 building [mo]: targets for 0 po files that are out of date
 writing output... 
 building [html]: targets for 6 source files that are out of date
@@ -1081,24 +1117,24 @@
 
 /build/reproducible-path/python-h5netcdf-1.5.0/doc/api.rst:11: WARNING: autosummary: failed to import CompoundType.
 Possible hints:
-* AttributeError: module 'h5netcdf' has no attribute 'CompoundType'
+* ModuleNotFoundError: No module named 'h5netcdf.CompoundType'
 * ModuleNotFoundError: No module named 'CompoundType'
-* KeyError: 'CompoundType'
 * ValueError: not enough values to unpack (expected 2, got 1)
-* ModuleNotFoundError: No module named 'h5netcdf.CompoundType'
+* AttributeError: module 'h5netcdf' has no attribute 'CompoundType'
+* KeyError: 'CompoundType'
 /build/reproducible-path/python-h5netcdf-1.5.0/doc/api.rst:11: WARNING: autosummary: failed to import EnumType.
 Possible hints:
+* ValueError: not enough values to unpack (expected 2, got 1)
 * AttributeError: module 'h5netcdf' has no attribute 'EnumType'
-* KeyError: 'EnumType'
 * ModuleNotFoundError: No module named 'h5netcdf.EnumType'
 * ModuleNotFoundError: No module named 'EnumType'
-* ValueError: not enough values to unpack (expected 2, got 1)
+* KeyError: 'EnumType'
 /build/reproducible-path/python-h5netcdf-1.5.0/doc/api.rst:11: WARNING: autosummary: failed to import VLType.
 Possible hints:
-* AttributeError: module 'h5netcdf' has no attribute 'VLType'
-* ModuleNotFoundError: No module named 'VLType'
 * KeyError: 'VLType'
 * ValueError: not enough values to unpack (expected 2, got 1)
+* AttributeError: module 'h5netcdf' has no attribute 'VLType'
+* ModuleNotFoundError: No module named 'VLType'
 * ModuleNotFoundError: No module named 'h5netcdf.VLType'
 looking for now-outdated files... none found
 pickling environment... done
@@ -1322,7 +1358,7 @@
 h5netcdf/tests/test_h5netcdf.py::test_complex_type_creation_errors PASSED [ 99%]
 h5netcdf/tests/test_h5netcdf.py::test_hsds SKIPPED (h5pyd package no...) [100%]
 
-================ 101 passed, 51 skipped, 1 deselected in 9.56s =================
+================ 101 passed, 51 skipped, 1 deselected in 3.80s =================
 I: pybuild base:311: cd /build/reproducible-path/python-h5netcdf-1.5.0/.pybuild/cpython3_3.13_h5netcdf/build; python3.13 -m pytest -v -k "not test_ros3"
 ============================= test session starts ==============================
 platform linux -- Python 3.13.2, pytest-8.3.4, pluggy-1.5.0 -- /usr/bin/python3.13
@@ -1485,7 +1521,7 @@
 h5netcdf/tests/test_h5netcdf.py::test_complex_type_creation_errors PASSED [ 99%]
 h5netcdf/tests/test_h5netcdf.py::test_hsds SKIPPED (h5pyd package no...) [100%]
 
-================ 101 passed, 51 skipped, 1 deselected in 8.82s =================
+================ 101 passed, 51 skipped, 1 deselected in 3.60s =================
    debian/rules execute_after_dh_auto_test
 make[1]: Entering directory '/build/reproducible-path/python-h5netcdf-1.5.0'
 rm -rf .pybuild/*/build/test.nc
@@ -1525,12 +1561,14 @@
 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/1467025/tmp/hooks/B01_cleanup starting
+I: user script /srv/workspace/pbuilder/1467025/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/3524147 and its subdirectories
-I: Current time: Thu Mar 26 07:34:37 -12 2026
-I: pbuilder-time-stamp: 1774553677
+I: removing directory /srv/workspace/pbuilder/1467025 and its subdirectories
+I: Current time: Sat Feb 22 03:13:05 +14 2025
+I: pbuilder-time-stamp: 1740143585